Vintage Elgin 15 Jewel Watch Movement

I've got this vintage Elgin watch movement that's been sitting around. It's a 15-jewel manual wind piece, made in the USA. The serial number is 30042346, which dates it back a bit. It's just the movement itself, no case or dial, so it's perfect if you're looking for parts or a project to tinker with. Used and shows its age, but the gears are all there.