N.O.S Shimano RD-6207, 600EX Rear Derailleur
First Generation Rear Derailleur in the 600 series. This is the Friction counter part to the 6208 which are SIS (indexed) only derailleurs.
Designed for 6speed SIS, but should work for 7 and 8sp as well.
Never Used or installed. Very minor cosmetic wear from storage. No box.