Originally Posted by
Ghrumpy
Sure it's not Swiss thread? Looks like it might be from the photo. That would be my guess. Motobecane used Swiss thread BBs a lot.
One ring on a TA cup means metric thread, and FG might mean "filetage à gauche" for left-hand thread. Not sure about the P though.
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+1
The old Specialitees T.A. thread code was ring(s)/groove(s) on faces of cups. Two concentric rings was BSC/ISO, one concentric ring was metric/French and no ring was Italian. So the cup set in the photo would be metric. In the past T.A. did not offer a Swiss cup. Perhaps T.A. added one at some point...
A capital letter P is employed by Japan as part of a Swiss designation. Their full Swiss designation is 35 X P1 S1. Their metric/French designation is 35 X P1.
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