The N5 Pennsylvania Caboose No. 4457 was issued in 1946 and 1947 as part of the "Electronic Set." Each of the cars in this set, including this one, had a radio frequency receiver on them that would allow them to be uncoupled anywhere WITHOUT the use of a UCS track section. The color of the decals on these cars determined which button to push on the ECU-1 Transmitter to uncouple the car. This caboose has a DARK BLUE decal with a Lionel "L" that read "ELECTRONIC CONTROL."
In 1948 this caboose was replaced by the No. 4357 in these sets.
This RED semi-gloss painted caboose was of all sheet-metal construction that is mounted on a BLACK chassis that has steps. It came with a smokestack, end hand rails, brake stands, ladders, tool box and a plastic air pump on the underside of the chassis. All versions have staple-end trucks with two electronic coil couplers, and interior illumination. Note that "EASTERN DIV" is printed below the number "477618" on the sides. The actual number "4457" for this caboose is rubber-stamped on the bottom of the chassis. Save for the addition of the electronic receiver this caboose is identical to the No. 2457. There are no variations.