Eric,
I'm going out on a limb here. That "Kuppenheimer" tag is not government contract. While Kuppenheimer made contract clothing in WW1, I believe the uniform blouse you have is a privately purchased item from this high quality civilian supplier. Generally, well to do Officers would order these to look snazzier than the high production government contract stuff. Notice the lay of the collar and its tab and the fit of the epaulets and the pocket flaps. I don't recognize the devices on the sleeve...some really old Doggie will have to chime in here.
(When I was at the NCO Academy at Quantico I went over into the 'ville and ordered a complete "Iron Suit" from one of the famous private tailors there who cater to the Marines. The fit was superb, and the price matched the fit!!!)
Waiting for John Sabato or Alinint to chime in here. I bow to their superior knowledge in almost all things, except cheap wine and 10 cent seegars. (JEEZ! This freakin' keyboard does NOT have a "cent" symbol!)
Guns