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.
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