Oilers
 

Period for Parker shotguns:

They're cute and I've accumulated a few, but they aren't unique to Parker. Every Singer sewing machine came with one, as did most of the better fishing reels. They were sold by jobbing suppliers, and for a charge, the end user name could be embossed on the tin.

the few I have are mostly branded for fishing reels

these are the first ones i ve seen...charlie

I have a small round one from Singer Sewing Machine Co around here somewhere.