Simson-blank chamber

I recently purchased from the Veteran a excellent Simson blank chamber luger,all original except for the magazines, serial 43xx.The pistol is apparently a Nazi re-issue as one mag is the aluminum bottom WW2 issue numbered to the pistol but the second is black bottom(plastic) with the serial number etched on the side. Holster a early nice 1941 dated. I was told this is the way it was captured but wondering about the second mag,did you ever see a late war mag numbered like this??