Recently I purchased a Unertl 1 1/4" Target scope for my WIN M-75. I got the scope for a very low price since it was somewhat cosmetically challenged and missing the screw in lens caps. The light rust and staining cleaned up very nicely and I made the scope caps. They turned out quite well and fit as they should. Colored them with Brownell's Oxpho Blue.
Made the ocular cap from some leaded stock and it went easily. The objective cap I made from a piece of old farm machinery shafting, I can't remember what I took it off/out of, I had laying around in the barn. It machined quite a bit tougher. 48 TPI and my old eyes made for some interesting times.