Vintage JCPenney Big Mac short sleeve coveralls.
Amazing pale sage green herringbone twill fabric. Beautifully worn in, with lots of repairs. The legs have been lenghtened with a different fabric, which results in a cool color-blocking with natural shades. 
Tagged a size 40 Regular. 
 
Measurements
Shoulders:
Pit to pit:
Waist:
Length:
Inseam: