17840 - As reported by Frank
The set that Frank has is completely different than the set is that I have on my spreadsheet. This set is steam and not diesel and the contents are all different. The second photo shows spaces for track and a transformer. This is what Frank has:

Set box.

Set contents. Note that there are spaces for track and a transformer. The track would be 12 sections of curve, 1 terminal/re-railer and 1 straight.
I have no information on which transformer is included in any of the sets.

Set box end. Anyone know why the box would say "1 ONLY # 17840"?