Your set of high grade Austrian pistols are valuable, set appears to be in near mint condition !!
Could not ask for a finer quality gift, must be a person that thought very highly of you.
My library of European gunmakers has gone missing since downsizing to a smaller home,
perhaps another member will page-in with info on the maker.
Can view similar sets at online auctions to get an idea of value in today's market.
I have no such friends