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Mark's Mamiya Sekor SX 50mm F2 M42-mount lens

Bought SN 115926 on 2-1-23 with the Mamiya Sekor MSX 500 camera, from a Goodwill auction. Has a M42 lens mount. The focus ring is skippy, you can feel it lose traction when turning. Has a bent filter front lens, was it dropped? You can see damage to the focus ring. Appears to work. Probably should go in the junk box. The glass looks thoriated, should probably check with the geiger counter.

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