Ferrari chose the English Clayton heaters for the early cars (195/212/340s). This is an aluminum tag in the shape of a triangle 77mm long on each side. Clayton Heater Tag
The 330s and 365s used a Borg Warner “York” air conditioning compressor. This is a 42mm X 40mm aluminum parts tag for the compressor. York Compressor Tag
The 250s used a German Z.F. steering gearbox. This is a small, black metal tag, 20mm X 50mm that identifies the pat number and serial number of the steering gearbox. This one is a duplicate from a tag on a 250 Short Wheelbase Berlinetta. Z.F. Steering Gearbox Tag