Interesting I thought it would be older than 1981. It’s a beauty regardless.Probably produced in 1981. That is a nice one! Square butt, which makes for slightly better handling on these small frame .22 LR units. Deb and I have several Kit Guns and most of them have the round butt. I like them both but do find the square butt easier to shoot well.
M prefix serial numbers started in 1969. Since they were only used on the .22/32 revolvers, it took a while for them to get into the higher numbers. M160000 to M193000 were from 1981.Interesting I thought it would be older than 1981.