The New York Central Pacemaker No. 3494-1 was available only in 1955 on a Type IIA GRAY and RED plastic body with WHITE rubber-stamped lettering. Rubberized man is activated by a plunger mechanism that is triggered by the use of a UCS or No. 6019 Uncoupling track. The Single-Block doors are almost always unpainted RED. This box car was equipped with bar-end trucks that have magnetic couplers.

Note: There is a fault in the "New York Central System" logo rubber-stamp that caused the second "S" in "SYSTEM" to have a "tail." See the close-up picture to the right. All of these cars have this fault.

There are two variations:

Variation A: Has both RED and GRAY painted on a most commonly WHITE body casting.

Variation B: GRAY painted on a RED body casting.