I'm wondering if anyone knows anything about the unusual centerbolts on the Record calipers in this Ebay auction. It looks like the arms had to be modified (countersunk) to accept the bolts. Also, I see no way to lock in the centerbolt adjustment, other than tension from the mounting nut (no Modolo-style set screw, or Shimano-style rear-mounted locknut).
Who made the bolts? What material are the bolts? Did these work?
The calipers are late 70's, or perhaps very early 80's. Are the bolts form the same era?
Item # 150083797824
Tom Dalton Bethlehem PA USA
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The fish are biting.
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