Can anybody help me indentify the manufacturer of this 32 cal. pistol? It is marked on barrel MODEL AUTOMATIC PISTOL 'PRINCEPS' PATENT. Underneath that is 32 and under that on the body is a stamp with a circle with a large E in middle with what almost look likes a scale going thru it. Circle has TRADE on top and MARK on bottom. Any help would be appreciated. Looked in blue book but can't find it or the stamp. Thanks all, Paul
'