1950's US Navy Pilot A-13A MS22001 Oxygen Mask

A-13A/MS-22001 US Navy regulation flying oxygen mask. Size MEDIUM. Dated 08/58. Made by MINE SAFETY APPLIANCES. Mint new condition, perfectly pliable and totally free of cracks with "Y" shaped green anodized aluminum fastening yoke. Standardized in the early 50's this mask remained in service with the US Navy and USMC pilots and aircrews from the early 50's to the late 70's. Perfect to dispaly an APH-5 or H-4 flight helmet. Helmet and display bust aren't included.