11/21/18 - This is a pre/early WW2 production Mauser Luger magazine. The magazine was most likely produced between 1936 and 1938. The magazine has an aluminum frame that was never blued (early style) and an aluminum base serial numbered "21 i" with and a droop winged eagle 63 military proof stamp. There are a few surface scratches near the top that just looks like aggressive cleaning, but does not affect the functionality. The magazine has no rust or pitting and is fully functional. Guaranteed original and authentic.