Vintage Dark Blue Jean Jacket

Here is a super cool jean jacket. This is a tough one. The tags are toast, so there's no way to authenticate the maker. The buttons are pretty unique, but I've seen them on everything from a 1950s jacket to a 1980s JC Penney. This material...most likely all cotton...feels older to me. So I'll call this a 1970s, knowing it could be older than that. Dark blue fabric with gold stitching, and wonderful lines throughout. Five snaps down the front and a buttoned pocket on each breast. Someone has removed the cuffs, which is a bummer. At least they did it evenly. It's in otherwise excellent condition with years of life left!! Here are the measurements taken laying flat. (refer to the last pic above to see how I measure shirts)

Chest (armpit to armpit) 20"

Sleeve 23"

Length 23"