The Operating Log Unloading Car No. 3361 was 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, and a No. 160 bin (if sold separately). Later editions would have tabbed couplers. Came in two different boxes. One was labeled No. 3361 and the other No. 3361X. The "X" denotes that this car was included in a set and did not contain the No. 160 line side bin. There are four variations:

Variation A: "LIONEL LINES" in thick 7/32" rubber-stamped serif letters and "336155" on the right side. WHITE plastic is used for the drive gear in the unloading mechanism.

Variation B: Similar to Variation A except the drive gear is BLACK plastic.

Variation C: "LIONEL LINES" in lighter rubber-stamped serif letters and "336155" on the left side. MEDIUM ORANGE plastic is usually used for the drive gear in the unloading mechanism and the car chassis is molded in a DARKER GRAY color.

Variation D: "LIONEL LINES" in thin 1/8" rubber-stamped sans-serif letters and "336155" on the right side. MEDIUM ORANGE plastic is usually used for the drive gear in the unloading mechanism and the car chassis is molded in a DARKER GRAY color.