Originally Posted by
JohnDThompson
The tabbed washer for the Huret Duopar/Success/Challenge derailleurs to fit Campagnolo-type dropouts:

I'm taking the one off my Cannondale, spending 5 minutes at work cadding it out and getting a couple 3D printed. Damn things are like hens teeth.
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My bikes: '81 Trek 957, '83 Trek 720, '84 Trek 770, '85 Centurion Cinelli