Louis Marx Electric Train Set Reversing Locomotive Original Box

Vintage Louis Marx electric train set in original box. Box states that this is "featuring reversing locomotive with "chug chug" sound, 25 Watt approved transformer." I assume this is 1970s era as it was stored with another train set from that era. It looks like this set was played with and returned to the box. Comes with 9 pieces of curbed track, 4 straight track, everything else pictured.
I do not have a means to properly test this set out, so I am selling it as-is.
Shipping always combined.
This toy is from a really great family inheritance which we can no longer hold onto. Please keep an eye on this EBay account as my father, the collector, had a great eye for toys full of character and color. Thanks for looking! (-: