[Shakethetrees]

Originally Posted by Tony PP

Not certain that you have a powder flask and not being certain can mean I am wrong. OK, it looks to be a heavy casting, most flasks are fairly light weight as you have to carry them. The long thread would not be ideal, I would not like to be grinding fine black powder in the threads as you unscrew the flask. Also if you are trying to use this as a priming flask, powder running across the threads is likely to spray everywhere and not into the pan. Last thought, your piece does't seem to show much age which I would expect to see on a original flask. So I think, not a primer flask but what it is ?

Spot on!