Rare 1980’s Vintage Bubblegum USA Long sleeve

American vintage Bubblegum USA shirt, in white with lace up denim collar. In good condition, I bought it and never wore it out of the house. It does have a stain of some kind from the right armpit area to the bottom of the shirt. It’s really faint and not seen easily- even in front of window light where these photos were taken. Could be easily removed with proper knowledge of stain removal.