This locomotive came with a smoke unit, headlight, and was controlled by a three position directional unit whose control lever is adjustable from the front of the square Belpaire smoke box that was used by the Pennsylvania Railroad. There is a Pennsylvania Keystone decal on the front that is numbered "6200".
This locomotive is equivalent to the 027 No. 2020. This, and other versions of the S-2 locomotive were produced by Lionel for both O and O27 Gauge sets. However, because of length of the eight driving wheels these locomotives run best on the larger diameter O Gauge track.
There are two variations:
Variation A: SILVER rubber-stamped number on cab.
Variation B: WHITE heat-stamped number on cab.