UNKNOWN PITONS # 31 - Two of the three pitons are marked "made in Austria."
UNKNOWN PITON # 32 - Has "made in Austria" mark.
UNKNOWN PITONS # 33 - The longer of the two pitons has a "Austria" ink mark on it. No marks on the shorter piton.
UNKNOWN PITON # 34 - No marks on the piton. My first thought is ASMU but it is unmarked. Circa 1930s 1940s
UNKNOWN PITON # 35 - No marks on the piton. Circa 1950s - 1960s.
UNKNOWN PITON # 36 - Looks homemade - feels like titanium, donated by Robert Gould. Robert originally obtained the piton through a ebay purchase. Possibly 1980s.
UNKNOWN # 37
Homemade piton wedges. I obtained these items in a eBay auction that had many climbing gear items dating between 1967 and 1973. I don't know for sure but I believe the wedges were made to be used along with pitons for aid climbing.