Owing to the lockdown very few WW1 British Army in Italy items arriving, but this card from June 1917 was one of the better items
Early in 1917 the Italians requested the loan of Heavy Artillery, in April 1917, 10 Batteries of 6 inch howitzers were sent out, and before the FPO 1LL datestamp came into use in late June 1917, the Italian Army postal system was used.
The attached card from a Capt in the RAMC postmarked 5th June 1917, addressed to Watford, Herts, signed sincerely HGH, is probably to an Aunt?, shows the normal Italian markings
Frank Schofield