100% Waxed linen L shirt or Shacket shiny Rare concept brand Waxy Vintage

This shirt is 100% linen. It has a slick shiny surface on the outside that makes it feel like it could be waterproof. The buttons look like mother of pearl. It is made in the USA. The material feels thick . I can not find another shirt or shacket like this. Button sleeves. Unique Measurements. Pit to pit 22” Base of collar to hem is 26”