John killer pick up!
I have one very similar TM with no letters but differs from yours.
Less detail in breastplate/ center single oval, less detail also in bottom of face mask, neck, and bottom of helmet.
I really can't ballpark date mine by grip plates as they are stag too. It is owner personalized but this one lacks any date, it dose have multiple air bases used during the TR time and marked to a heavy fighter group.
It does have a distributor mark maybe one of the guys can date it close with distributor style and with different TM ? I'll add some pics soon.
Steve,
