Post by T.A. Workman » Mon Dec 13, 2021 12:07 pm
Gentlemen,
I've finally paired up my Model #300 Yankee Spiral Ratchet manual return screwdriver with a Model #301 (top) automatic return variation.
These were produced by THE RUGER CORP in 1947 and were Bill Ruger's pride & joy. He designed and built the machine that cut the spiral shafts, six at a time.
Terry



Note the difference in distance of the Company Roll Mark, manual (r) 1/2" & auto (l) 5/16".

Picture from John C. Dougans book Ruger Pistols & Revolvers, page's 32 & 36

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