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 late 275 GTB/4s and 330s used a new type air cleaner assembly with four “snouts” on the sides replacing the perforated steel side panels. These air cleaners used a large rectangular blue F.I.S.P.A tag. These are 92x35mm with 67mm hole spacing. These and all of the earlier tags are attached with small aluminum or steel round-headed hand-bucked rivets. The very early tags on the “Ram’s horn” castings were attached with “U-drive” or “Drive screw” type fasteners. Rectangular F.I.S.P.A air cleaner tag for 275/330/365s
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.