The Sunoco Single Dome Tank Car No. 6555 is an all metal car that was available in 1949 and 1950. It consisted of a die-cast frame without steps, sheet-metal tank, and the lettering is by decals, on the left "SUNOCO" diamond, and on the right side "S.U.N.X. 6555." Cars whose decals have not discolored with age are highly valued today. This car came with a brake stand, ladders, and placards that are usually located on the ends, however, there are no steps at the corners of the chassis.

The only difference between the No. 2555 and this car are the magnetic couplers that were used instead of the electronic coil couplers that were previously used on the staple-end trucks.

Lionel used up the remaining boxes of the No. 2555 and overprinted the No. 6555 on these boxes, as is illustrated to the right. Lionel very rarely sold these overprinted boxes separately. Instead they included them among the contents of train set boxes.


There are three variations:

Variation A: Sunoco decal with "GAS" and "OILS" inside the YELLOW diamond logo, and a large lettered "S.U.N.X." decal.

Variation B: Sunoco decal without "GAS" and "OILS" inside the YELLOW diamond logo, and a large lettered "S.U.N.X." decal.

Variation C: Sunoco decal without "GAS" and "OILS" inside the YELLOW diamond logo, and a small lettered "S.U.N.X." decal.