Jacket, Jumper, US Navy, Undress Blue Service

Genuine WWII US Navy "Undress Blue Service" jumper. A general duty working uniform made of wool for the enlisted man that was worn in temperate zone weather conditions. The "undress" designation indicated that the uniform was not meant for dress wear. Undress uniforms were worn with or without the neckerchief depending on the Sailor's job designation. The trousers were the same type worn with the dress blue uniform, but the jumper was simplified in construction and not adorned with white piping.

WWII Label on back. 

Fits like a size Small (34R).