This is the 7 round .32 ACP magazine from Mec-Gar for the iconic Walther PPK.
Manufactured from heat treated blued carbon steel the model is fitted with the classic finger rest made form black polymer. Also available in a nickel plated version.
Mec-Gar are the OEM manufacturer for many of the major firearms makers including Beretta, CZ, SIG and Walther.