Thanks for the numbers!
The dgm is, I think, a type approval number but I have no way to reference it to a model number.
The chassis number though would appear to ID the model as a 116A (Giulietta 1.8) or a model 116A1 (Giulietta Super with a 2.0). Although I have the 116A diagrams, I do not have the 116A1 2.0 diagrams. The 2.0 diagrams I have are the 11638 Giulietta 2.0 and the 11671 Giulietta 2.0 TI Super.
Series 2 USA 1750 GTV (in Series 1 European clothing)