The Operating Brakeman Car No. 3424 was introduced in 1956 and used a Type IIB 6464 series box car body. The first issues were DARK BLUE and had a DARK BLUE brakeman (Variation A). Later issues would be in a MEDIUM BLUE (B Variation) color with a WHITE brakeman.

This car was last issued in 1958, and came with a center rail, and sliding shoe pickups on Type 7 trucks with magnetic couplers. All cars included two telltales with track trips that triggered the man to "drop down" to avoid hitting the telltales. The fingers on these telltales are very fragile and are often found bent. Reproductions exist, but care should be taken when replacing these fragile parts.