I have come across two pieces of italian artillery manuals, Both have been used by the same Artillery student back in 1940. The manuals contain what seems to be the complete guide to Preparing to shoot (preparazione del tiro)praparing Tracking and direction (puntamento in direzione) preparing elevation, etc etc... 300 page manual. Even has the fasces on the back. with the letters LDS around the symbol.
The second manual is called esempio di tavola di tiro grafico- numerica, which im guessing is a numerical table and graphs for shooting the model 100/17 mod. 14 and mod. 16
If anyone is looking for technical data regarding the artillery please ask i can scan and send the info that is needed. It is in Italian. translation may be required.