Thanks, Kactus. I have several sets of NOS SR brakes of various vintages. The first gens had missing fasteners. Eventually I want every part of this bike to be correct. Meantime I want to build it and ride it a bit first. Next to my '84 Nuovo Mexico, this is the most elegantly spidery, minimal bicycle in my collection. Without a rider in place, it's difficult to see just how delicate these frames were!
Here are those four beefy Russians astride their Colnagos during the 2-hour race: