Double Flint Weis/Senger

[rennikselum]

A friend recently acquired this piece. Internet search found a similar Senger/in wien double sold at an auction without much more info other stating from Vienna. Any info or comments about the origin or anything else would be welcome.
It has a number of wood patches in it, not sure how recent. Plenty of pictures as I took them to study the engraving. Its the bottom gun in the first few pictures.

Jeff