I think I have what you are looking for but I can't seem to find any information about it. There are no engraved markings but a brass symbol with two crossed swords and "7" above the X and "A" below the X was originally soldered to the bell. Brass mouthpiece attached with old brass chain. Does not seem to be a replica since the wear and patina are very natural. Can you help me find out more about my bugle?