Was this the one posted before? Regardless, if I read the ad correctly it is being sold by a former Thunderbird, and was not issued to a Thunderbird but comissioned by one for incentive rides. If I read that correctly then IMO it is NOT A TBird helmet but a replica.
Hello. The pilot helmets is one of the admiration for a airplane collector. I have two Thunderbirds pilot helmets made by flight suits. (These are not repainted flight helmets. Really expensive!!)