Any opinions on what the gun might be worth? $1500 is the opening bid. Although a Belgian make, per the seller, most of the proof marks are German. I see 10.16 on one of the barrel flats, maybe indicating Oct 1916? Any thoughts, opinions, idle speculation are welcome. I don't have any personal experience with Pieper, but from what I've read they made good guns, and this one doesn't seem to be JABC.

http://www.gunbroker.com/Auction/ViewItem.asp?Item=78680269