Dutch Gas Gun 12mm caliber revolver. Dutch Gas Gun, Nembrug marked on frame. Very scarce gas or flare revolver. 6-Shots. Caliber is 12mm barrel is 2 inches and the octagonal part is half an inch. Gun has 98% original blue. Action works perfectly, single or double action. Grips are very good. Serial number A141 on barrel flats. If you collect flare or gas or oddity guns this one is for you!