I recently came across one of these sets that had two different engines (one with the yellow airbrake and one without) and one with a plain 6027 caboose and one 6027 caboose that had a smokestack and metal battery box under the center of the cab frame. I assume the one engine was just missing the air brake, but is anyone aware of a 6027 with smokestack and brake box, or was this customized by someone?
Thanks!