Most likely a"Hercules" brand jacket. The leather is in very good condition with a great natural aged/patina appearance. The jacket has recently been professionally relined with cotton drill material + new vintage type "talon" main zipper. The upper left side pocket zipper is missing pull chain. The mouton fur collar and pockets are in good condition.
Jacket size is not marked, but fits like a 40 regular, refer to actual measurements taken in inches.