For several years I have been trying to find out if anyone knows any of the following manufacturer's logo or markings. PR Usually on the butt of FIE brass frame revolvers. COM Found on several revolvers. Only other markings are the proofs and "Made in Italy". DOM Same marking as found on COM revolvers. MOFRA This has been found on Patersons sold by Replica Arms. Two elongated Diamonds with side points touching. Also found on Replica Arms.