Found this in a junk box purchase, attached to a Lionel tender. The small hole on thr right is not the piston but air is forced through it.

:eek: Yeah, I found a project at the train show. It has a speaker and a sound board. It's an 1130 tender with Pennsylvania markings. The back says made by Lionel with 8060T marking. The production is 1978 to1982 about. I found the print in the Lionel section 1-9 . The board is 8142T-35 The...