Another Masi expert has pointed out to me that many early Masis came with a variety of rims, and he's right. They did. I've seen those with Ambrosios and Fiammes, and I'm sure other rims showed up on the bikes.. and if it started out as a frame only (and many did, I'm sure) the question is irrelevant.
I was more interested in the early 70s Masi GCs. The original bikes I've seen (admittedly, a limited number, probably a dozen or so) all had the truncated-pyramid-stickered Martanos. And my understanding is the Martanos were standard on the bikes assembled in Carlsbad, although others can confirm that better than I can.
The question was, and remains, *which* Martanos?? And in what year?
Charles Andrews
SoCal