American WW2 Army Officers dress tunic. Officially called the Coat Service Officer's OD Dark but often just called the Officers A class tunic.

This US Officers tunic was worn by all Branch of services including the Infantry, Armoured, Airborne, Air Force and Military Police in World war Two.

The US Officers OD 51 dress tunic features:

    Four front pockets closed by brass buttons.
    The top two pockets have a centre pleat and shaped pocket flaps.
    The lower two pockets have straight flaps.
    Front is closed by 3 large brass buttons and 1 plastic button, the plastic button is flatter than the brass ones and is hidden by the waist belt.
    Shoulder epaulettes each with a small single brass button.
    One inside pocket.
    Braid on the wrist band.
    Waist belt is part sewn on and has a brass buckle.
    The back has a slit from the bottom hem up to the waist belt for a comfortable fit.