Opened crate, 7.5 MLE 1929 C boxed ammo

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Just picked up a few sealed boxes from a recently opened crate dated 1967, from my surplus dealer. He is bringing much out, most of which he bought 15-20 years ago, and stored up in the second floor. Unfortunately I wanted to buy the US 1941 M2 crate, the Bren 303 crate, and this French one but he will not sell them off. Anyway, any info or comments to enlighten me about this French 7.5 is appreciated. I bought a few boxes of all his opened crates as they are all sealed and pristine, putting away in ammo cans for my vintage ammunition collection. See pics.

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Some of his 1941 FA .30 blanks for interest.