032, 380 37mm Mle 1916 - I've just read on Polish military history forum
https://www.dws.org.pl/viewtopic.php...693&start=5550 an information, referring to newly found documents, that from the beginning of 1940, these old guns were returned to line units as stop-gap AT guns, receiving new Mle 1935 sabot rounds (used by weapon 12 37mm SA18 m.37 as a tank gun) - and regulation ammo load by then was 112 HE and 80 AP rounds. Earlier, in mid-1930s these guns were withdrawn as obsolete. It was believed before, that only tanks used these rounds.
By the way, all guns of this type could have bigger ammo load - I have no earlier information, but 192 rounds (12 boxes of 16 rounds) might have been applicable. Earlier, only 12.5% were AP rounds (old Mle 1892).