The New York Central Pacemaker Box Car No. 6464-510 was produced in pastel BLUE for the "Girls Set" No. 1587S in 1957 and 1958. It used a Type IIB body with bar-end trucks and tabbed couplers.
The BLACK lettering was heat-stamped on this car and the Multi-block doors were painted PASTEL YELLOW. Note that the number "6464510" appears on this car that except for the color and the number is the same as No. 6464-125.
This, and the M-K-T No. 6464-515 box car, are the only 6464 cars that were never sold separately and were only available in the "Girl’s Set." There are no known variations of this car that is highly prised by collectors.