£85. inc p&p
Alan Jones Militaria.
De - Act Warnant Single Barrel 9mm Shotgun. Hinged Breech Block, orginated from around the 1900's. I think that this gun was made by Warnant? They seem to be big time Belgian armourers from the turn of the 18th century. More details here.
Surfing the web reveals that this might have been a centerfire or pinfire gun or something? Also that it was sold to gardeners that wanted to get rif of slugs and snails from their plants.
From what I can see the Warnant action is the thing here.There seem to be a few pictures around the web but the trigger gaurd seems different in most. Aslo it seems they were sold in America in department stores like Sear, lol. Theres a thread with picture links here.
Some pictures (click to enlarge):