50 BMG Ammo ID

I have a full can of 50 BMG M-33 ball ammo with the head stamp of D M 45. I know it was made in '45 but can anyone ID the DM? The seller stated that it was made by Talon. If that is true then it was probably remanufactured by them, the ammo looks very recent.

Des Moines ord plant, Des Moines IA

The case is WWII Des Moines, but the ammo probably is recent Talon production.