Amazon.co.jp: Shimano DURA-ACE R9100 Series Rear Derailleur RD-R9100 11S Compatible CS Low Side Up Up to 25-30T (Compatible with Top 14T Gears) 33600 : Sports & Outdoors
Shimano Dura Ace EX rear derr. 7200 , early 80's model – Defietsenmaker
Shimano Dura-Ace Rear Derailleur - Bellport, Brookhaven, East Patchogue