http://www.ebay.com/itm/281687540794
This vintage coat was made in the mid to late 1920s. The jacket is wool gabardine that has been Cravenette Processed to shed showers. The process’s name became a generic name at this period for this style of coats that doubled as lightweight overcoats and as raincoats.
The “double service – for clear days for storm days” slogan of Cravenette’s was phased out by the late 1920s, helping to further narrow the dating down. The coat is a double breasted trench coat style, introduced c. 1915. The jacket has a half-belt back, with a center pleat terminating in triangular reinforcement stitching. It is partially lined.

Chest (pit to pit): 21″ (doubled = 42″)
Sleeve (center of collar to cuff): 32″
Length (Base of collar to hem): 43″