One of approximately 2,000 Greene patent carbines manufactured c. 1855-1857, according to "Flayderman's Guide" (9th Edition, 9B-057). The top of the receiver is marked "GREENE'S PATENT/JUNE 27. 1854", the lock plate is marked "MASS ARMS CO./CHICOPEE FALLS/U.S.A. 1856" next to a large British Crown over "V x R", and the cap cover is marked "MAYNARD'S PATENT/SEP. 22. 1845". The left side of the barrel has a double "British Broad Arrow" proof with a letter "S". The top of the barrel breech and frame have a British Crown over "A/ 2" and "A/ 5", respectively. It has the correct iron patch box on the right side of the buttstock with a small "U.S." stamped on the left side of the rear upper corner of the buttstock. On the underside of the buttstock directly behind the trigger guard are several British Crown acceptance proofs. Included with the carbine is a vintage cap tape.