The Operating Log Unloading Car No. 3451 would unload logs into the line side bin with the use of a 6019 or UCS track section.

Produced in 1946 until 1948, there would be three variations of this car that have to do with the way the shaft swivel retainers are mounted, and whether this car has heat or rubber-stamped lettering. The rubber-stamped lettering is more indistinct. This car has staple-end Type 3 trucks, and came with five logs and a No. 160 bin.

The No. 3451X box was used when this car was included in sets and the No. 160 bin was not included with the car but was included in the set box. The "X" rubber stamp is located on the box end only.