This vintage coat was made in 1948.  It is french army issue, either for a motorcycle despatch rider, or for the cavalry.  It has leg straps to keep it from flapping in the wind, and pass through slits instead of pockets.  It has a small collar, raglan sleeves, an attached belt and metal buttons. There are buttons inside which look like they could attach to a liner.
Chest: 30″ (doubled = 60″ = size 56)

Sleeve (center to cuff): 33-1/2″