The fact it has been repaired would rather point towards actuall use than to mal intent by the seller.
I have no idea if there is a provenance but it would be most likely used during the tthirty years war where everything ran low.
We know from Michael his threads that many haquebut barrels from the 1500s where reused in guns for the thirthy years war, beeing obsolete. Such was the need for arms.. i can imagine something similar for powder flask.
Fun thing with this piece is that it is hinged on the top. If you where to unscrew the screw opposite the hinges it would open up and offer an insight into the inner bowles of this flask.. maybe even proof of black powder
