K&E 4080-3 ---- 1939-1949 Scale Set 4th Edition
From the collection of Clark McCoy
There are 4 variants with the 1939-1949 scale set. They vary in the printing of the K&E name, the patent numbers, K&E logo, and extra marks on LL scales. The forth one is shown here.
The rule has the K&E logo on the right end of the front side and the LL scales have range marks.