Thanks for the information on when the changeover occurred. I have owned several Sugino road cranksets from the early to mid 1970s and still have one from the early 1980s, all with 144mm BCD, and I have even seen a 151mm BCD on a late 1960s Sugino crankset.
I may have more 144mm BCD rings than I need -- PM me if you are looking for a particular size.
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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