http://www.ebay.com/itm/271934443374
This vintage jacket was made in the early 1930s, probably between about 1930 and 1934. This style, with the plain back, side panels with buckle adjusters, leather waistband and small patch pockets, was one of the first jacket styles to become popular following the invention of the separable bottomed zipper in 1930. The jacket has a buttoned throat latch / chinstrap, and while the zipper is a 1950s Conmar, replacing what would likely have been a double branded Hookless/Talon, the grommets from the original zip are still in place at the waistband.

Chest (pit to pit): 18″ (doubled = 36″)
Shoulder to shoulder: 15″
Length (base of collar to hem): 23-1/2″