Sorry, I can't speak to your tags, but "normally" ammunition box tags were designed to be "damaged" upon unsealing the box. Examples of early Frankfort Arsenal seals were paper, so that opening the box or crate, removing the wire, etc. would necessarily destroy the seal. Lead seals were common for many years, crimped around the wire, so that opening the box would require damage to the soft lead. The intent was to detect tampering, theft, pilferage, or even honest withdrawals of stocks that would alter storage conditions, change inventories, etc. Further, ammo technicians were instructed to further "damage" the seals, obliterating markings, etc. so that the same seal could not be used again.
