Here's another take on specs for MAFAC brake pivot B-Os, this one lists "Clearence between pivots" instead of C-to-C:
http://picasaweb.google.com/
Kurt Sperry Bellingham, Washington USA
2009/8/19 R.S. Broderick <rsb000@hotmail.com>:
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> While I would not consider attempting to comment intelligently about the specifics of Weinmann or Paul offerings without benefit of being able to first review my collection of cycling literature (...which is still in transit as part of our recent household move), I can tell you that MAFAC Raid calipers measure 75 mm center-to-center at their pivot bolts as opposed to the more typical 62 mm distance for MAFAC fixed bridge and 63 mm for their adjustable bridge center pull calipers including the Dural Forge, Racer, 2000, Competition, "S", and "GT" models.
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> You are welcome to confirm any of these measurements using the following link:
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> http://www.velo-pages.com/
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> Specifically, you will need to adjust the focus of your viewing down toward the bottom right portion of this rather large poster.
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> Robert "measure twice, cut (...or braze) once" Broderick
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> ...the "chronically cloudy clime" of Oregon
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> Portland, USA
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>> Date: Wed, 19 Aug 2009 04:48:13 -0700
>> From: tristramos@yahoo.com
>> To: classicrendezvous@bikelist.org
>> Subject: [CR] WTB: Mafac Raids, or similar
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>> I've made the mistake of brazing before measuring, and it turns out that the centerpull bosses I brazed onto my frame are spaced too widely for the Mafacs and Weinmanns that I own. They're about 78mm apart, and it seems that Mafac Raids, Weinmann Vainquer 800s, Paul Racers and a few other centerpull brakes are about right.
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>> I probably can't afford the Pauls, so I was wondering if anyone has a set of Centerpulls with mounting bolts about 78mm apart for sale?