I found these to guns on a bench at my clubs gun range. I have contacted the President of the club and reported. No owner has stepped forward so far.
But, I have researched every gun book I have, plus researched on line and cannot find out who or what about the guns. The only thing is "made in Germany" on the side of the barrel. The guns have consecutive serial numbers. They are single shot .22 LR. and break open.