Originally Posted by mech986

Francophile, thanks for the additional information. Your *305198* serial number confirms a clear 1973, May, 198th frame if my interpretation of the numbering scheme is correct. Its been hard to get serial numbers on the Gran Turismo, Gran Rally, and Nuovo Record's that I've seen primarily because the owners don't tend to photograph or show the numbers. It is not clear if each model had its own numbers or shared them across the production with the Super Speciale, later Superlight, and the base Nuovo or Viva Sport. Usually I've found the early Italvega's have the frame size stamped on BB socket for down tube or between the chain stay sockets, but apparently some got out without them!