This looks like the oldest gun that I have. It is chambered for .22LR. This picture shows Mark111. Mine is a Mark1. I bought it in 1961. I paid $37.50 for it. That was so much money at that time that I had to buy it on layaway! I didn't have any guns at the time and I had a wife and two small children, so I wanted to have something for protection.
It has been a great gun! I don't have any idea of how many shots that I have put through it, but it's a lot. I taught 6 children to shoot using this gun. I still like it and plan to have it the rest of my life. It has been great!