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Is there any way to tell who built a 1975 California Masi GC?

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Is there any way to tell who built a 1975 California Masi GC?

Old 05-16-23, 04:46 PM
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Is there any way to tell who built a 1975 California Masi GC?

Just picked up a 1975 Carlsbad Masi GC, and the only marks I can find on the bottom bracket shell/downtube lug, aside from the +GF+, are the MC and size stamp, and a serial number that's a bit hard to read due to a re-paint, but is in the high 600's. Is there any way to determine which sub-contractor might have built this bike? Thanks much in advance!
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Old 05-16-23, 04:52 PM
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There are detail differences such as the bend of the fork legs or a spade cutout in the bb shell that can pinpoint certain of their builders.

Pictures please!
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Old 05-16-23, 05:10 PM
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Originally Posted by dddd
There are detail differences such as the bend of the fork legs or a spade cutout in the bb shell that can pinpoint certain of their builders.

Pictures please!
?

Assuming 6xx and not 06 xx
it would be that number plus 25 as to the build number. The first 25 were numbered differently.

bike 1000 was about the middle of 1975.

the bikes in 1975 were a communal effort save a few Special Build bikes.

Mario Confente was running the show and attending to the high risk brazing - think seat stays to seat lug. An area that required reheating. Later others could do that task too.

I think the 1975 interval bikes were peak Masi, the staff was trained, paint was good. A 6xx bike should have the stamped “pressed” lugs as some call them.
a key note would be the seat lug, two graduated diameter holes at the front of the seat lug in the seat tube tang, stamped lug with the Masi modifications. No holes in front, triangular window below the seat lug ears, investment cast.

a for sure Mario built frame? A bike with an Mx serial number. Also noted would be the size such as MC55 (55cm for example)

06 xx would be bike 1,6xx (+25)

Last edited by repechage; 05-16-23 at 05:20 PM.
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Old 05-16-23, 05:36 PM
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Thanks much for the help! Yep, it's a 6xx- Here are a few close ups:





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Old 05-17-23, 12:06 AM
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I would move the front brake saddle washer and locate a campagnolo toothed washer to the front of the crown, ditch the saddle washer at the rear caliper and locate another toothed washer between the caliper and the brake bridge, where the saddle washer is now originally had just a campagnolo chromed washer with a small chamfer. The mounting tube extends forward enough to catch the cinching force.

the lower head lug may or may not have the modified down tube socket shoreline. The early bikes had more material, sometime after Faliero went back there was a revise, bikes in the 200’s had the extra material, I am not sure when it definitely changed. A Mario change for the Carlsbad bikes. It did change in Italy also, maybe as early as 1973.

bike must have bar end controls as the band clamp is really adjacent to the lug.
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Old 05-17-23, 08:09 AM
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Here are a few file pics of my 75 after bead blasting. My frame does not have TT cable guides or shifter bosses.


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Old 05-17-23, 09:34 AM
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How seat stay caps should be done.
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