Chuck and Olefogey
I don't like the second mag either. In my opinion, the first and third numbers are probably not a product of Mauser. As for two mags with the same number from a different era, this is not possible. Read the post under holsters for the transitions between magazines. The only suffix range that would fit the type of magazine pictured was the 1937-S/42 range in the - p - through - z - and the 1939-42 in the - p - through - z - blocks. Mauser apparently had this all figured out. They put a bigger 63 under the stick eagle for magazines issued with the 1939-42 pistols. Consequently, if you held in your hand Luger magazine number 1234r with a small 63 and 1234r with a larger 63 you have one each 1937 and 1939 magazine. If you have in your hand 1234r and another 1234r with the same size 63 under the stick eagle, you may have a problem. On the other hand, If by magnified comparison the numbers, suffix and magazine configuration appear exactly the same, maybe Mauser failed the + test. The serial number of the pistol would have to beyond the - r - block with a straight wing eagle 63 acceptance. Mauser further eliminated the possibilty of matching the wrong era magazines by the change to the SE-655 acceptance mark about mid-way in the 1939-42. I also agree with all you guys, There should always be a + on the second Military magazine.