Re: PMCC Waltham Pocket Watch - 10 Year Anniversary in 1925

Posted by Owen_Dyneto On 2018/3/3 17:13:48

BDC, you've got me wondering if you're joshing. They are used to make nearly frictionless bearings or pivot points for the axles. I'm no watch authority but I see 7 of them. Better movements were 21 jewels, and (uncommonly), 23.