This is an unissued/unused USGI, Switlik Parachute Co. manufacture, Air Crew underarm casualty life preserver type MB-1.
Mint shape and operational. Has two co2 detonators (cylinders not included), oral inflator, dry battery strobe light, (add water to activate battery), inspection record and of course the harness. Whistle and marker dye not included. Have a couple of these so photos are the example of the lot. See pics for details and feel free to email me if you have any questions, thanks.