Up for bid is a Flight helmet and oxygen mask complete set, so you don’t have to go chasing a helmet or a matching mask. The Helmet comes with the O2 mask and Visor and shows signs of typical military flight use, with all the usual nicks, scrapes scratches. It appears that the helmet has all electronics communications for military aircraft (Not tested). The flight helmet is as found with no further history. Please look at all the photos closely and ask any questions ahead of time ear...ly. No buy it now or sidebar deals to end the auction please. Sale is for the helmet, visor and mask only. Sold as is and only in the continental United States only! No overseas sales! Will display handsomely. I am not in any way an authority on military items so I will do my best answering any questions. Check out my other auctions by hitting the "See other items" button. I will be gone from 6/6 to 6/11 and be unable to ship but I will ship out any auctions sold during these dates on 6/12. Thank you. On Jun-10-19 at 19:02:35 PDT, seller added the following information:I have had several bidders ask about the helmet size. I have looked inside and out and I couldn't find any relivent marking at all.