This is a Great, Rare, Vintage US Coast Guard officer's military dress white uniform coat/jacket.
This wonderful Old piece has a Great, Vintage design, with Gold Bullion embroidered Wool shoulder boards/epaulettes, is marked "The Skipper - Seagoing Uniforms NY - Sanforized", ID'd "Holgate", made of cotton twill, an
Original, Vintage example, from around the World War II era, and is Rare to Find. This has no marked Size, but actually measures approx. 21" from armpit to armpit and 32" from top to bottom. This appears to be in Very Good, Crisp physical condition, with missing removable buttons and some light yellowing/soiling.