Roughwear said:Some close-up shots of the details would be really helpful in dating this jacket-back of collar, underarm vents, and collar. Is the lining original to the jacket and has the mouton been replaced?
The jacket design is almost that of an M-422a. The jacket has a small back panel, and front leather that wraps around past the underarm, reminiscent of M-422a designs. The pockets are also quite far from the zipper, and the shoulders are a bit tight, especially for a jacket from 1960.
Roughwear said:My guess is that your jacket is a 1960 fiscal year California Sportswear G-1 MIL-J-7823. There is one on JC's flight jacket CD and it is the only G-1 from the 1950s that has a narrow back like your jacket and a pointed collar.