US m1 STEEL HELMET FIRE DEPT RED COLORED POT E7854 - eBay (item 120467013065 end time May-04-10 17:35:24 PDT)
these must have come off a decommissioned Navy ship? they had 48 of these
I have one that is marked UNIT 11 on the front & back
these must have come off a big ship to have this many?