Join Date: Jul 2000
Bikes: 1959 Capo; 1980 Peugeot PKN-10; 1981 Bianchi; 1988 Schwinn KOM-10;
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That is technically not a U-brake, but a centerpull caliper. The Swiss Weinmann Vainqueur 999, built in 610 and 750 lengths, was one of the classic centerpull brakes of the late 1950s through the mid 1970s. During the mid-1960s, all Schwinn "10-speeds" from the Continental up through the Paramount used 999s, in contrast to the Varsity/Suburban/Collegiate, with their Weinmann sidepulls. Through the 1960s, the 999 was standard equipment on the Raleigh line, from the Professional and International down through the Super Course. The 999's primary competition came from Mafac and Universal, both of which also made superb centerpull brakes. Starting in the late 1960s, DiaCompe (Japan) meticulously copied the entire Weinmann line.
By the way, I just finished cleaning, recabling, and completely rebuilding the original 999 calipers on my Capo; they still work great, particularly with KoolStop pads. The 999s are very easy to modulate and provide more stopping power than the first-generation Campag. sidepulls (boo, hiss) on my Bianchi. To date your calipers, refer to classicrendezvous' Swiss section.
"Early to bed, early to rise. Work like hell, and advertise." -- George Stahlman
Capo [dschaw'-poe]: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger, S/N 42624
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1981 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069