This Thompson 1921 was manufactured by Colt for Auto Ordnance. Colt Mfg 15,000 1921's.This Thompson came from a Police Dept. in Ohio the dept.purchased the gun new from Colt in October of 1934 and we have a copy of the original paperwork. The gun is in 45 ACP it comes with a original "L" 50 Rd Mag. Comes with one stick mag and the orignal brass cleaning rods and the original oiler. The serial # 3085. This is a must have for the true collector.If you have any questions just drop me a Email and I would be glad to help. If you are curious about the department or want to see the paperwork on the gun let me know.