I have an old Husqvarna 648, built on a small ring commercial (no thumb slot in the left side of the receiver) pre-1898 style Mauser action, in 8x57 JS that has a rugged side-mount with an early (friction windage/elevation adjustments)Weaver K2.5 installed on it. I'm sure that it would be functional for casual hunting, but I've never carried it afield in the eleven years that I've owned it and it has only been to the range a couple of times.

I just have too much stuff, firearms that never get fired, scopes that never get mounted, mounts that are over fifty years old and are still NIB.