Edwardian 1920's frock coat trousers size 32 reg

A rare pair of black trousers to be worn with a frock coat circa WW1. The trousers feature a cinched high  back, flat front and straight leg. 

Measurements 

Trs - 33 (originally a 31) x 31 ( 1" spare)

Fit - 32 reg essentially. 

Condition - Excellent