Not a shoulder patch in the lot.

Those guns look like old French 75mm guns.
The 10th Mountain Div fielded 75mm exclusively, due to the nature of their mission. I'm looking to see what independent artillery battalions still had 75s later in the war. So far the only 75s I am finding are pack 75s

The lack of helmets in the Italy pics could be a good clue too.

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Best Regards,
JW