Sweatband markings, inc. contractor no., are exactly the same on mine--the one I made a valiant, but futile, attempt to make my regular outdoors hat.

Looking at it again, I'm impressed by the intelligence of whatever anonymous Quartermaster clerk thought it made good sense to call a hat a hat, as opposed to labeling it with a stupidly vague term like "cover." How many different kinds of "covers" would have been in the inventory of the QC? Covers for breech mechanisms, muzzles, sights, entrenching tools, mess-kits, and hundreds of other items for which only a generic term could be used, because there existed no more specialized term. But every language provides an unconfusing general term for an article of clothing worn on the head, and that term is "hat."