75mm Field Gun Shell - Marking Identification Help - General Ammunition Discussion - International Ammunition Association Web Forum

Hello everyone, I’m hoping to get a bit of help identifying some headstamp markings which i just cant seem to make any sense of. From what I understand: 75 DEC = (In French) 75mm Canone de Campagne (Or in English, 75mm Field gun). I suspect that PX is the makers mark, however my research has only yielded PX as “Unknown Factory, France” I imagine that “D.240L.15.D” implies some sort of ‘Lot number’ and date but cant make sense of it (maybe 1915?). Similarly, i have no idea what the ‘T’ and ‘a

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