Vintage Rockabilly Ricky Pullover Vest Rayon Stewart Plaid Tartan Knit Back XS

Rayon I believe on the front panel, back and trim feel like cotton. 1950s?

Condition: good vintage condition, light discoloration on neck trim

Size boys 16 fits men’s XS women’s S/M

Pit to pit - 17.75”

Length - 20.5”

Thank you for looking