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
Ferrari had a long relationship with the Shell oil company. A lot of the early cars had some type of metal tag in the engine compartment specifying the type of Shell oil to be used. Shell Oil X-100 SAE 40 Tag. 70mm x 25mm For 275, 330 & 365
The “Clam Shell” type jacks were supplied with the “inside plug” 250 series cars. A drawing of these jacks can be seen on page 256 of Richard Merritt’s book Ferrari: Operating, Maintenance, and Service Handbooks 1948-1963. The jacks had an A. Rejna metal tag riveted to the top casting. The original tags were either red or green. Red A. Rejna jack manufacturer’s tag.
These are aluminum tags that were used on the early 1950s cars. The reservoir mounting bracket had four tiny slots and the end tabs of these tags were inserted into these slots then bent to hold them in place. The brake fluid was very corrosive so few of these tags survived. Early Brake Fluid Reservoir Aluminum Tag.