1/24/18 - This is an original G Date Luger magazine with a B/90 proof stamp on the base. The B/90 proof is seen on G Date and K Date Lugers, but K Date Lugers didn't have letter suffixes except for a few thousand in the a block (I think the latest recorded K Date serial is 12xx a). This magazine would be for an early G Date since it's still in the "a" block, but past the first 1500 serial numbers. The base is serial numbered 7429 a with a "+" sign, making this the spare magazine. The magazine is in excellent, fully functional condition. Guaranteed original.