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Collection of pages from K&E catalogs for the DeciLon Overhead Projector

Demonstration Slide Rule

Description:

Catalog page from the 1967 catalog

K&E produced special transparent plastic versions of several models. K&E model 68 1955 is a transparent plastic DeciLon slide rule for use with an overhead projector.

History:

The model 68 1955 was only shown in the 1967 catalog.