Steve! & all who have posted! Thank you for another fun gear thread. I don't think I've seen it before. I had better post my one item of CM gear. An ice screw I bought about 1971.
It is about 8" long & 5/16" thick. I never had the guts to use it on ice, but it worked well on wine corks.
It shows up at top in this Sept. 1972 gear photo in the Bugaboo roadhead parking lot.