NOS SHIMANO DURA ACE REAR MECH DERAILLEUR VINTAGE OLD 90s 9s SPEED RD-7700 25th | eBay
USED Shimano Dura-Ace RD-7700 Rear Derailleur 9 speed Road Silver
Anyone familiar with this Dura Ace RD-7700 rear derailleur? Looking to use it with a ten speed cassette but was wondering if anyone has tried it (bc of age, manual only mentions