In my basic training days(dating myself!)the T-shirt,had to be white & ,all of your underware,had to be stamped for laundry
purpose.My last name is Ahern.My # was11394725.Therefore,
before folding,it had to be stamped A-4725.That's how you fold
T-shirts like a pro. Irish
P.S.At least it was in 1961.

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Irish---Better to be dead & cool,then alive & uncool!
(Harley Davidson & the Marlboro Man)