Early bullet style taillights on the 1956 #46 Suburban Pumper. Photo courtesy Fred Carlton

Later button style taillights on the 1956 #46 Suburban Pumper. Photo courtesy Fred Carlton

The bullet style and bezel and the button style with backing plate are not interchangable. Mark states, "The holes (for the bullet style) are in the same identical location as the regular button type taillights, but the holes in the fender (for the bullet style) are slightly bigger, not smaller. The holes are made to be larger to accommodate the single chrome plated bezel which in its design has a larger O.D. which is the bent metal prongs. If you were to try to place those into a regular button style taillight, it would not fit. I know this from experience with the models I’ve had in my collection..."