Posted by MH on December 04, 2003 at 18:26:56:
In Reply to: Re: Re: Valve Buttons posted by huh? on December 03, 2003 at 17:00:08:
Ninth Edition, ca.1937 p. 1006 calls it the American Standard Fine Series.
Easy-(enough)-to-get tooling
No good reason for 40 vs. 32, but there are way more obscure options than 6-40.
must've thought it was better pitch
M. "putting the book back in that center drawer of the chest, where it belongs" H.