Confusing assembly numbers for serial numbers. Scenario: A user posts online: "My Model 19-5 has serial number 3421." They are wrong. S&W has not made a 4-digit serial number since the 1800s. They are looking at the yoke assembly number. Check the butt.
Disclaimer: This article uses aggregated collector data. For official certification or insurance appraisal, contact the Smith & Wesson Historical Foundation. smith and wesson model 19-5 serial numbers