Hello, i'm new to this site and had a question that i was hoping someone could help me with. i have a US revolver Co 32 S&W i know some about this gun, that is is an Iver Johnson off shoot and i'm thinking it was made around 1910ish. the manufacture number (under the grip) is 49151 with no letter prefix. the number under the trigger guard is 49191. my question i guess would be is there a web site, book or place i can gather more exact information on this gun and possibly a few others (H&R). i'm looking for exact year and maybe any registered information on this gun. thank you everyone in advance.