Those odd (to me, anyway) jet/emulsion numbers may be the result of Webers refinement for a particular application? Don't know. The venturi size can be checked by looking in the intake side of the carb. The venturi size in mm is cast into the venturi. In this pic, the number in the 6 o'clock position says that this venturi is a 32mm.
Series 1 Euro 1750 GTV
Series 2 USA 1750 GTV