Possibly antique Lifting Breech German Flobert Shotgun excellent Garden Gun

Exceptional little garden gun. To open breech you lift the knob on right which extracts and opens. 

I haven't been able to date the gun yet but it has old german proofs for, "proof", "second proof", and "rifle". Very odd to me it is rifle proofed as it is a smoothbore and stamped 9mm (Flobert). The bore is perfect. All matching gun with numerous number stamps. Surprisingly, it has a very smooth and light trigger. 

Send your email for higher resolution photos and send your postal code for a postage quote. If anyone knows if the proofs are date bound and might date it prior 1898, please advise. I don't find a nitro proof so assume it's probably antique. 

I avoid bargaining but if an item doesn't sell I lower price.