“OF” generally means it was “outside fitted” and is a replacement part.
Best Regards,
WACA Life Member #6284 - Specializing in Pre-64 Winchester .22 Rimfire
Jeremy P said
But it was a Winchester genuine part, yes? They stamped them and sent them out to a gunsmith for example to show non-factory work? Correct me though if I’m wrong!
Yes, it was a genuine part. Typicaly it was stamped on mail order parts that Winchester would normally fit in-house. They wanted to know if the gun was returned if the part had been fitted by Winchester or by a local gunsmith.
Here is an internal factory note from 1902 that references the “OF” marking of parts. It mentions barrels specifically but the stamp was used on other parts that required some hand fitting as well.
Best Regards,
WACA Life Member #6284 - Specializing in Pre-64 Winchester .22 Rimfire
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