Scope Recommendation for old Winchester 63 semi-auto .22

[graycrait]

I scored a pair of Winchesters yesterday to go with the Win 62A I already owned. Incidentally the Win 62A I acquired yesterday is a 1956 vintage, the same year as the other 62A. However, the 1939 Winchester 63 was altered long before I acquired it. Some previous owner had it drilled and tapped (a huge no no in the collectors' market but I don't care, I shoot my guns). Installed was a sturdy well-mounted scope base that allows .22 tip off mounts. On the mount is an older Weaver D6 6x w/fine cross hairs. Unfortunately it is not very clear. Does anyone have any idea of another small rimfire scope that be a better match for this old rifle? I could take the mount off but don't want to and would rather have an older scope "that works" on it. Thanks.