10/16/17 - This is an original pre WW2 G Date Luger magazine. The G date Lugers were made in secret by Mauser prior to WW2 - and many were stamped with a W/154 proof or eagle/154. Similarly, this magazine has a 154 proof stamp on the base. There is also a serial number "136 c" and a "+" sign meaning this was the spare magazine. The 3 digit serial number, along with the eagle/154 is very scarce and desirable. Excellent condition and fully functional!