This is an exceedingly rare magazine for an HK P7 with early HJ date code which means it’s a 1979production. While prototypes have been found with earlier date codes, 79 was the first year that Heckler & Koch produced the PSP, though it was still a very small number made. The only difference in these early mags is the date stamp and this mag has a phosphate (grey colored) finish where post 1980 mags are almost always blued or nickel finish. The same mag works for guns marked PSP or P7 but this will not work on any other P7 variant (P7M8 P7M13 P7M10 or P7K3). The basic design is the same but either the caliber is different or the actual size of the mag is different.
