K&E 4081-3 (68 1210) ---- Last Production Run in 1975
From the collection of Clark McCoy
This rule is from the last production run of the 68 1210s in 1976. When the Hoboken plant was closed they found enough blanks that needed to be finished for about 2000 rules. The blanks were shipped to the Salisbury plant to be assembled. This story is provided by Joe Soper in his book, "K&E Salisbury Products Division Slide Rules". This book is available form The Oughtred Society.