I am new to this forum and am fairly new to collecting Smith and Wessons. I recently purchased a Model 3 chambered in 44 American. It has "MO PY" stamped on the back strap. I have found that this was from the Missouri Penitentiary. The Missouri State Penitentiary opened in 1836 along the banks of the Missouri River in Jefferson City, Missouri, the state capital. The prison housed inmates for 168 years and was the oldest continually operating prison west of the Mississippi until it was decommissioned in 2004. It seems some big names served time here through the years. Some member of the James Young Gang and the Reno Gang did time there in the 1870's and 1880's. I have a letter from S&W that states serial number2437 was sold on October 12, 1871. It was delivered to M.W. Robinson Co., New York City, NY. There is not any information from there. I was hoping someone has some information or knowledge of these prison guns and the history surrounding them.