Just looked at a Campagnolo headset currently lised on eBay as a "Nuovo Record Pista track headset", but it sure looks like the Gran Sport model with the double wrench flats on the adjusting cup/race.
The eBay item number is 150439830400, or search via the following address:
Believe this is incorrectly identified, but if the Record Track ever used this type of adjusting cup/race, I would be interested in knowing it.
Regards,
Kevin Kruger - Grantville, PA USA