I am afraid that this indicator may be unreliable: I have a 1983 team frame with a digit designation and no letter designation (left side of the BB cover) and a 1985 frame (certainly not a team) that has no digit designation, but has a letter designation ... No number can suggest the "custom" or "team" frame, but nothing proves it, unfortunately ...
Last edited by CyclesMakaron; 07-11-19 at 05:45 AM.
Reason: google translate