This is a good used N3B airman's jacket. It is showing heavy use and wear. It is still in good usable condition for it's age. It is missing one top button on the closure flap. There are some stains and it is dirty from storage.  There is also a wear through hole on the collar. (see pictures)   It has a date of 1974 which would be Vietnam era. All the zippers work. This is a size Medium which is a 37 to 41 chest size.