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. 340-342 Shell Oil Tag, 100mm x 60mm
The Dunlop master cylinders had a small plastic “zip tie” parts tag embossed with the part number and the date of manufacture. This is a very detailed reproduction of a 275 GTB original. Dunlop Master Cylinder I.D. Tag
The next generation of tags was crescent shaped with a blue field and black writing. These were introduced in the mid-1950s and were used on both the individual coffee can type filters and the new “Three-in-One” type air cleaners which had a single long housing that contained all three individual filter elements. These tags had a chord length between the rivets of 51mm. Early F.I.S.P.A blue and black crescent shaped tags with the 51mm chord length.