Collection of pages from K&E catalogs for the Decitrig Overhead Projector
Demonstration Slide Rule
Catalog page from the 1967 catalog
K&E produced special transparent plastic versions of several models. K&E model 68 1960 is a transparent plastic Log Log Duplex Decitrig slide rule for use with an overhead projector.
The model 68 1960 was only shown in the 1967 catalog.
Scans: Link to scans of the 68 1960