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MBU-3/P oxygen mask straps. These were used to hold
the MBU-3/P mask to the pilot helmet. The two snaps
attached to the helmet side, the loose ends of the
straps attached to the mechanical bayonnet which
attached to the mask. These were in an envelope
marked..Strap Assy., Snap Fastener Left Side. AF SN
5534-49959. Made by Mine Safety Appliances, their
p/n 49959. Dated 1958. These are UNUSED, but may
have some minor rust spots from storage. I believe
these can be used for r/h side as well as l/h...