Yep, seen a bunch of them. Most recently was an HK coded HK91 a few months ago. It will, of course, only be found on models made in 1979, so that limits the possibilities to just a few thousand 91s and 1200 or so 93s. I'm not sure of which or how many handguns were made that year that may have the HK date code.With all this talk of date stamps, I've never once seen one stamped "HK". Is there a reason for this or are ppl just coveting them that much?