Interesting -- perfect half-step gearing was stock that year.
By sometime in the early 1970s Schwinn had changed to 14-16-18-23-26, with that big ugly 5-tooth jump right where I want a gear. (I run 14-16-18-20-23-26 6-speed on the Bianchi, which works very well with either 50-47 half-step or 50-42 1.5-step.)
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"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069