I am posting some cinelli fork crown information (with slight edits and message-merges from me) from Richard Sachs, about Cinelli Sloping crowns. Richard is not a member of the CR mailing list right now.
I asked Richard about availability, because cinelli lugs and bottom brackets seemed to be widely available and were used on non-cinelli's in the late 1970's and early 1980's. I am including his responses below.
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the cinellis were sand cast (by george fisher) in switzerland. no one had them but cinelli in the 1960's and early 1970's.
the raleigh-pro/holdsworth/bob jackson sloping crowns were made in birmingham by davis components. it takes some elbow grease and a 12" 1/2 round file, or similar grinding technology, to re-contour them. no one used them as-is; they were too rough.
the cinelli crowns (that were put in to the marketplace) were sold to anyone, but only AFTER the investment-cast generation of the mid 70s. by then, you (anyone) could buy a cast version of the style that once was the cinelli supercorsa trademark. but who would want that?
all changed at cinelli when antonio columbo bought and reorganized it in the mid 70's. and by then, coincidentally, no one really used sand cast or forged parts anymore.
e-RICHIE http://www.richardsachs.com Richard Sachs Cycles No.9, North Main Street Chester, CT 06412 USA
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Thanx, Richard!
- Don Gillies
San Diego, cA, USA