Fairly Well Preserved Ammo for 50 Years in the Drink
Vietnamese media recently reported on a pile of vintage small arms ammo that was recovered from the mud of the Tiền River that looks like it just came from the factory.
Local media showed members of the Vietnamese Army inspecting the ammo, reportedly illegally salvaged from the river near Thuong Phuoc on the Cambodian border and confiscated by Border Guards. It has been underwater for decades, purportedly in a deep-sixed PCF, perhaps one that was put there in 1975 by its ARVN crew during the final days of the regime.
The fact that it was in fresh water and likely covered by a layer of mud surely helped but either way, you have to hand it to the quality of those green ammo cans, much of which likely dated to WWII anyway.