HEADSET:
O.M.A.S. Superleggera - threaded headset - 1" (25.4 mm) x 24 TPI Italian thread - high strength Ergal (aluminum alloy) construction - Clear anodized finish - 1/8" or 3.175 mm ball bearings without retainers (...62 count total at 31 each upper and lower) - aluminum alloy upper and lower bearing cups with pressed steel race inserts - 26.4 mm hardened steel crown race - aluminum alloy top lock nut and "keyed" washer - model 120 "Big Sliding" Superleggera : Pino International, Ltd. (Pino Morroni) headset spacers - aluminum alloy ... [A high quality and lightweight aluminum alloy replacement unit of my choosing which happens to be consistent with all of the other O.M.A.S. componentry used in the reconstruction of this bicycle. Introduced to market during model year 1976 and produced well into the mid 1980’s, this was one of the precious few contemporary alternatives that might actually be considered an upgrade as opposed to a mere substitute for the Campagnolo Super Record model 4041 aluminum alloy headset that came fitted to this particular Pino Morroni. However, inasmuch as Pino had seen fit to use a pair of custom made headset spacers on that original Super Record component, I thought it only appropriate to re-use those very same personalized pieces in conjunction with the O.M.A.S. Superleggera headset seen here. In an effort to better explain that which might not be intuitively obvious, the advantage to supplying dual spacers instead of just one of a fixed size is that they may either be used together as a pairing so as to provide a 42.2 mm stack height in common with post 1982 second edition aluminum alloy Campagnolo Super Record headsets having that tall machined washer with lettering in the recess around its circumference, or singularly by removing the serrated spacer so as to render a 39.1 mm overall stack height equivalent to standard steel Campagnolo Record model 1039 headsets and/or pre 1983 first edition Super Record model 4041 headsets, both of which use a slim locking washer having the same form factor (...albeit the former being made from steel whereas the latter was crafted from aluminum).]
