The Slide Rule
Trading Co.
Paul Ross
SlideRules@SRTCo.us |
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Frederick Post Slide Rule Cross Reference
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This chart lists all "Frederick Post"
brand slide rules by model number and by when they were sold.
Post never manufactured their own slide rules but they were vigorous
sellers of other manufacturer's rules--some under the "Post" name and
some under the original manufacturer's name. This cross
reference is concerned only with rules that were sold under the "Frederick
Post" name. Model (catalog) numbers are in horizontal
rows and dates in vertical columns. A grey cell
indicates that I don't think Post was selling any rules with that model
number that year. Click on any white or green cell
to learn all I know about that particular slide rule at that particular
time. I try to show the catalog entry, a scan of
a specimen rule, the original manufacturer's name and model number and anything
else I found interesting.
I use the words "model number" and "catalog number" interchangeably
for Frederick Post brand items. (For non-Frederick-Post
brand items the catalog number assigned by the Post Company has no relation
to the model number used by the original manufacturer.
Post catalogs rarely mention the original manufacturer's model
number.)
Credits: Ted Hume was coauthor of the original
research back in the 20th century. Peter Holland provided
all the information about Dennert and Pape and urged me to publish the results. Georg Schreiber provided all the information about Koch,
Huxhold & Hannemann whose rules I had confused with Dennert & Pape. I apologize to the many persons who provided material
but receive no credit because I have forgotten their names.
Paul Ross
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Manufactured by Dennert & Pape
from before 1903 to c1917 |
Manufactured
by Nestler, KHH and, possibly, others from c1920 to 1924 |
Manufactured
by Koch, Huxhold & Hannemann from 1925 to 1930 |
Manufactured
by Hemmi Seisakusho
from 1931 to 1941 |
Manufactured
by The Roos Company and Grafton Plastics from 1942 to c1946 |
Manufactured
by Hemmi Keisanjaku KK ("Hemmi Bamboo Slide Rule Mfg Co. Ltd.")
from c1947 to c1975 |
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| Model No. |
1903 |
1910 |
1921 |
1922 |
1923-24 |
1925 |
1927 |
1930 |
1932 |
1936 |
1937 |
1940 |
1942 |
1944 |
1945? |
1949 |
1955 |
1960 |
1963 |
1966 |
1969 |
1971 |
Teledyne |
1972+ |
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| 1410 |
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1410 |
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44BB-100 |
10-Scale |
Beginners |
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| 1414 |
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1414 |
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44BB-140 |
13-Scale |
Beginners |
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44BB-150 |
9-Scale |
Beginners |
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| 1420 |
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1420 |
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44CB-200 |
Darmstadt |
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| 1422 |
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1422 |
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44CB-220 |
Rietz |
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| 1426 |
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1426 |
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44CB-260 |
Commerce |
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| 1431 |
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Adjustble 5" |
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1431 |
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| 1432 |
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Adjustble
10" |
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Models
in aqua below were "Temp Dsctd" in 1942 |
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| 1433 |
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Adjustble
20" |
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| 1434 |
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Engineer's 10" |
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| 1435 |
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Eureka 5" |
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| 1436 |
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Eureka 10" |
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| 1437 |
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Nautical 10" |
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4" with
Vertical Top Edge |
1437 |
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| 1438 |
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Logarithm
10" |
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5" Mannheim
Multiphase |
1438 |
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| 1439 |
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Vicari
Sewer |
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1439 |
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| 1439D |
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Midget |
_Circular |
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1439D |
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| 1440 |
Engineer's
10" |
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High School 10" Celluloid
Indicator |
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4" Mannheim |
1440 |
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| 1441 |
Improved
Engineers 10" |
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4" Mannheim
w Mag Lens |
1441 |
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4" Vest
Pocket with Magnifying Lens |
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Mini-Versal |
44DA-410 |
4" Vest |
_Pocket |
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| 1442 |
Improved
Engineers 20" |
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5" Pocket |
High School 10" Glass Indicator |
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1442 |
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5"
"Dual" |
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| 1443 |
Imprvd
Engnrs on metal |
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10"
Studnt |
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5" Extra
Thin |
1443 |
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| 1444 |
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10-inch
Mannheim |
Student 10" (1440 plus S & T) |
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5" thin
Multiphase |
1444 |
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1444 |
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| 1444A |
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Probably non-existent |
10" Reitz |
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1444A |
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| 1444C |
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Probably non-existent |
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1444C |
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| 1444D |
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1444D |
5"
"Commerce" |
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| 1444K |
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5"
with CI and K |
1444K |
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5" Pocket
Slide Rule |
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1444K |
44DA-440 |
5" Pocket |
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| 1444P |
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1444P |
5"
Plastic |
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| 1445 |
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5" Thin
w Folded Scales |
1445 |
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8" Student |
44BA-450 |
8" Studnt |
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| 1445P |
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1445P |
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8" Student
Plastic |
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| 1446 |
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Student
10" (1442 plus S & T) |
10" Student Mannheim |
1446 |
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10" Student |
10"
Student |
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| 1446D |
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1446D |
10" Student |
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| 1447 |
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4"
flat lens |
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1447 |
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10"
Student |
10" Student with CI and K Scales |
44BA-470 |
10"
Studnt |
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| 1447A |
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Same 1437 |
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1447A |
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| 1447D |
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1447D |
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10"
Student |
Demonstration |
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| 1447DA |
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1447DA |
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Large Demonstration |
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| 1447DP |
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1447DP |
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Projecton |
_Student |
44AA-47R |
Projecton |
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| 1447M |
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4"
Magnfy |
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1447M |
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| 1447P |
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1447P |
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10"
Student Plastic |
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| 1448 |
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Mannheim
Adjustable 5-inch |
5"
Mannheim |
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1448 |
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| 1449 |
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Mannheim
Adjustable 10-inch |
10"
Mannheim |
1449 |
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| 1449T |
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Thin
10" Mannheim |
1449T |
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| 1450 |
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Mannheim Adjustable 20-inch |
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20" Mannheim |
1450 |
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Versatrig |
44CA-500 |
Versatrig |
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| 1450DP |
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1450DP |
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Projecton |
_Verstrig |
44AA-50R |
Projecton |
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| 1451 |
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5" Universal |
1451 |
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Pocket_ |
VersaTrig |
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| 1452 |
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Mannheim
Multiphase Adjustable 10" |
10"
Universal |
1452 |
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Universal |
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| 1452D |
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1452D |
10"
Universal |
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| 1452P |
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1452P |
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10"
Plastc |
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| 1452T |
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10"
Thin |
1452T |
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| 1452W |
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1452W |
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Wide Universal |
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1452W |
44BA-520 |
Universal |
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| 1453 |
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6" Extra
Fine |
1453 |
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| 1454 |
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Mannheim Multiphase Adjustable 20" |
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20"
Universal |
1454 |
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| 1455 |
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10" w Folded Scales |
1455 |
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| 1456 |
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Electrical
Slide rule 10" |
10"
Electrical |
1456 |
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| 1457 |
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1457 |
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Mannheim |
_Trig |
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| 1458 |
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Multiphase
Duplex 10" |
10"
Universal Duplex |
1458 |
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| 1459 |
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10"
Log Log Duplex |
1459 |
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| 1460 |
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Ritow 10" High School |
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20" Electrical Duplex |
1460 |
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Versalog
"IA" |
Versalog
"1B" |
Versalog II |
44CA-600 |
Vrsalog
II |
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| 1460DP |
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1460DP |
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Projection 1460PD |
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Projecton |
_Versalog |
44AA-60R |
Projecton |
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| 1461 |
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10" De Luxe Duplex |
1461 |
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Pocket_ |
Versalog |
Pocket
Versalog 1B |
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Pkt
Vlog II |
44DA-610 |
Pkt
Vlog II |
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| 1462 |
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Ritow 10" High School |
_Upgrade |
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1462 |
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Power-Trig |
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| 1462H |
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1462H |
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Postrig |
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| 1463 |
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Ritow 10" Student |
_Manifold |
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1463 Midget Circular |
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1463 Midget Circular |
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44EA-630 |
Midget |
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| 1464 |
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Ritow 5" Manifold
Adjustable |
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1464 |
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Binary
Circular |
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44EA-640 |
Binary |
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| 1465 |
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Ritow
10" Manifold Adjustable |
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1465 |
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Atlas
Circular |
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44EA-650 |
Atlas |
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| 1466 |
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Ritow 20" Manifold Adjustable |
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1466 |
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| 1468 |
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Ritow 10" Manifold Duplex |
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| 1470 |
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Ritow 10" Manifold |
_Simplex |
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| 1471 |
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Ritow 10"
Merchants Log Log |
_Adjustable |
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Click for information about
the tables on the backs of closed body slide rules. |
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| 1472 |
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Ritow 20" Merchants Log
Log |
_Adjustable |
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| 1473 |
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Ritow 10" Merchants Log
Log |
_Simplex |
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Click for information about
trigonometric scales and scale sets like "Mannheim" and "Rietz." |
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| 1474 |
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Ritow 20" Merchants Log
Log |
_Simplex |
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| 1475 |
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Ritow Cylindrical |
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| 1490 |
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1490 |
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Control
Engineering |
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| 1491 |
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1491 |
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Chem
Rule |
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