Moonman posted:Carey,
An interesting puzzle, indeed!
M.M.C. still exists as Crispin Valve in Berwick, PA , also an interesting place.
This company has a rich history and essentially was a 1:1 railroad car manufacturer in the late 1800's at it's beginning.
Having been an armored tank builder for WWI and a railcar builder perhaps earned the company the commission to build the Railroads at work exhibit track.
I'll ponder the track plan.
Carl.
I think you may have Multiplex tied together with Jackson and Woodin Manufacturing in Berwick which in 1881 became American Car and Foundry. The Multiplex Manufacturing company started in 1905. They held the first patent for air valves developed by the owner Clarence Crispin.(thus the name change now) They have produced a myriad of products. From Automobiles in 1919 to Hot Dog makers as well as a second attempt at cars in the 50's. During WW2 Multiplex made airplane pistons. They are still owned by the original family. I believe the original factory burnt down at some point.
