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. 250 GT/Berlinetta/4.9 Shell Oil Tag. 172mm x 76mm
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.