The crag hammer version of the late 70s early 80s Stubai metal shaft hammer. I have yet to conclusively date this version but research reveals two very similar versions, the “Walker” and the “Combi-hammer”, in the 1982 through 1985 Bergsport catalogs. The handle design on the Habeler/Messner hammer was the same as the 1982 Combi-hammer.
Reinhold Messner and Peter Habeler made a formidable team from 1969 through the early 1980s. The were the first team to summit Mount Everest without the aid of bottled oxygen on May 8, 1978.