Found this Keystone K70 and was wondering if anyone knew anything about it. It's in mint/perfect condition, still runs..including vacuum tube, no dirt, marks...this is one cool find. The case is still in great shape. I don't plan on selling it, but was wondering if anyone knows how to run it and how much it is valued. TY in advance. Here what I took of it with my p/s: Sorry for a lot of photos, but I wanted to be sure everyone could get a good look at it. I actually want to run it soon, and use it occasionally. I've had it on, but somehow the locking mech. is in place, locking the gears. How can I get it to run again? Thanks for the help.