Years ago when I serviced early brake calipers I always got the Black bakelite 65-66 insulators,I just got two new brown fibreboard insulators with a bunch of NOS brake samples,were they year specific,like 65 1st design,or randomly used thru 65-67.I always thought the used ones were brown plasic till I got these and can see the weave.I hoping to find new sample of each piston/insulator used.
Or pictures
Or pictures