Oversized short Mackintosh Coat by Camiel Fortgens.
Reversible fabric.
Adjustable button tab closure at the back.
Two angled welt pockets
Four button front closure.
Irregular top stitching.
Raw details at the edges.
–
Polished horn buttons.
Rubber bound, 100% Waterrepellent (!) cotton 

Elliott is 6'3 and wearing a size S