10-inch "Student" Slide Rule with CI and K Scales
Frederick Post model 1447[1949-71]
Teledyne Post model 44BA-470 [1972+]
Hughes-Owens model 1768C (early), 341-3526 (late)
Hemmi model 40RK

Page below is first mention in a Post catalog of model 1447.  ( It's described just below model 1446.)
1949 Frederick Post General Catalog,  Pages 68-69

Top and bottom edges are vertical bare bamboo
Back:  Bare bamboo with table on thin plastic
Date code "QK" (November 1966) enbossed into bare bamboo on back