Need help with Marlin 60 + Nikon scope

[clearconscience]

I have an old glenfield model 60 (marlin)
My stepdad gave it to me. It was all gunked up like it had been shot to heck and put away 30 years ago and never cleaned.

I cleaned it up, still has the original scope, after all these years still shoots dead on. Didn't even have to adjust it.