From the early 1950s until about the time of the introduction of the outside plug 250 engines in 1959, Ferrari used the black Magneti Marelli B-7 design coils. These were slightly larger than the B-5s and again had the mounting bracket spot welded onto the cans. The whole assembly was painted satin finish black and the aluminumB-7 tags were attached to the bracket with two tiny “u-drive screws.” The usual practice was to cut off the ends of the aluminum tags, at a 45-degree angle, near the end of the lightning bolts and then attach them with one rivet on each tab. I have alos seen original pieces with full-length tabs and using two rivets on each tab. Blue aluminum Magneti Marelli B-7 coil tags.
This is an aluminum tag with a black overlay. These tags were mounted on the top of the timing chain housing on all of the V-12 engines until the 275 GTB 4 cams when they were attached to the top, rear of the air cleaner. On the 330s the tags were moved to the top, front of the left side valve cover. These tags are mounted on the aluminum castings with small “U-drive” rivets and to the 275GTB/4s with the hand bucked round head rivets. V-12 Firing Order Tags with correct rivets