hk4 x 4 cals

My father-in-law has an hk4 in near pristine condition (95%) with the 4 barrel conversions and magazines, both boxes, tools, signed test targets for each barrel, and manual that he has offered to sell me for $1500. I don't know if it's of any significance or not but this one has brown grips...

Hi there I have a question for someone more knowledgable than I. I have come across the box of a P9S that I had years ago. I just noticed that it does not have the same label as my other boxes. The label says HK P9 not P9S could this be a box for one of the earlier DA only pistols? Was there any...