Vietnam Era G.I. Infantry cap dated 1958

Vintage Vietnam Era G.I. Infantry cap dated 1958. Some of the signatures have faded and some of the writing is gone but still holds a lot of character. It has some damage as you can see in the one picture. Tag is blank so I’m not sure the size. This came from an older gentleman’s barn clean out sale and it was hidden away in a G.I. Bag and U.S. flag which was a 48 star flag. Very cool and rare historical piece and is one of a kind. Any history buff would love this and should get it now. Thanks!