Hmm, Looks like I embellished the story a bit before I found the facts.

I swore we discussed it here, but I can't find it in the archives.  And
other places I may have posted about it don't have archives.

https://www.traditional-tools.com/the-amazing-flotax-1957/

https://www.bladeforums.com/threads/a-floating-axe.1156508/

Kirk in HMB, Off the phone for the day I hope