[Pinfold]

My father recently passed away and I recieved as part of my inheritance a beautifully engraved underlever cape gun and my online research has come up a little short. The engraving along the top between the barrels reads E(I think?) Triebel Augsburg and on the right-side rifle barrel is engraved GUSS-STAHL. There are no other markings save decorative engravings. I am including photos (apologize for the quality- they are from my cellphone's camera). Does anyone have any idea of this gun's history or approximate value? My father always said "One day I'll tell you about this gun." and that day never came as he was taken from us rather suddenly and unexpectedly. I'd greatly appreciate anything anyone could come up with. Thanks.