The Operating Log Unloading Car No. 3361 has four variations. Two of these have to do with the color of the plastic drive wheel in the unloading mechanism and the position of the data lettering: left side: Variation A, or right side: Variation C. The other two variations that we’ve shown have to do with the type of lettering that was on the side. Variation A has serif letters and Variation D has sans-serif lettering.

Produced on a GRAY plastic body, the "LIONEL LINES" lettering and car reporting data was rubber-stamped on. This car was produced from 1955 until 1959, and came with five stained logs, bar-end Type 7 trucks with magnetic couplers. Later editions would have tabbed couplers.