FWIW........
I came across this auction in Montana listing a lot of various things....furs, rugs, WWI & II rifles, various military items, leather flt helmets, etc. Among the items I noticed some old aircraft related things. Anyway....just passing it along for whoever might be interested in this old stuff......aviation and non-aviation.
B-17 O2 regulator
https://davisbrothersauction.hibid.com/ ... =6&ipp=100Item number (Lot) 561 is supposed to be a WWII aviator headset.
https://davisbrothersauction.hibid.com/ ... =100&q=560This is supposed to be an aircraft hydraulic gauge from the Korean War era.
https://davisbrothersauction.hibid.com/ ... =7&ipp=100