Vintage 1967 Authentic USAF Cold Weather Field Jacket with Button-in Liner M/L

This is my father's USAF Basic Training cold weather field jacket from 1967. It has the removable button-in quilted liner, the attached unlined hood hidden in the zippered collar, and still has his last name written in red ink on the tag. Excellent condition all things considered - there are no rips, tears, or stains, all buttons, snaps, & velcro are present, the zippers are fully functional, there are some loose threads here & there, and some fading from wear (you can tell by the color that the hood was rarely used!). There is a discrepancy in the labels though - the liner one states it's a large while the inner jacket one states it's a medium. By the pit-to-pit measurement it certainly seems like a large (46), but please let me know if you want any further measurements.