The Lionel Santa Fe NW-2 Switcher No. 616 used a BLACK body with BLACK and WHITE safety stripes on sides and ends, heat-stamped lettering "ATSF" and railroad herald. This engine had a horn unit that operated off of a C sized battery that was held in place at the bottom of the sheet metal chassis. The decorative horn and bell have been removed. On some of the shells used for this switcher the holes for these items have been plugged and on others they are still there. Note: on the picture above a bell has been added, but this is not how this switcher was manufactured.
Some examples of this engine have operating disc couplers at both ends. It came with a light on the front of the unit, Type IID motor, two axle Magnetraction, and was equipped with a three position directional unit whose control lever was adjustable from the bottom of the body. Came with Instruction Sheet No. 616-9 dated 6-61. There are three variations:
Variation A: Body wth open directional unit and bell slots. (1961)
Variation B: Body has an open bell slot but the directional unit slot has been filled in (1962).
Variation C: Body has both the directional unit and bell slots filled in. (1962).
Lionel issued this diesel for use on O27 Gauge track, but it will operate equally well on the larger radius curves of O Gauge track.