Deadstock French workwear  or leisure 'sports' trousers.
Circa 1930's/1940's 
 
Straight leg fit with side adjusters on the waist, and buttons on the inside of the waistband to attach suspenders. In beautiful unworn deadstock condition with the original tag still attached. 
 
Measurements in inches:
Waist 28"/29"
Inseam 27"
Front raise 14.5"