Well, I must admit being taken aback at the comment by pd, not sure what he is driving at but to me this thread has been really great with some postings of trains that I would never have seen any other way.
So to continue with my own contribution, I did post on 1/14 pictures of my long sought, Marx Monon FM "B" unit, the 4 wheel version. At that time I believe I noted that they also made an 8 wheel "B" unit, but candidly since I had searched for so long for any "B" unit I doubted that I would ever encounter another one. Well, that's what is so unique about this hobby. Low and behold, I had the opportunity and did in fact acquire the 8 wheel version of the Monon FM B unit. Pictures below.
Here is the Marx Monon FM diesel "B" unit, 8 wheel variety. This really shows the Marx art of lithography, note the use of shadows in the portholes, hatch doors, and vents to give the illusion of depth, the car side is in fact completely flat.
Here is the classic quarter view.
Finally the end view. I am really impressed with the shadow effect for the end doors. They look remarkably 3-dimensional and when you look at the item, you would swear that they in fact are openings in the side. They are not, the doors are completely 2 dimensional and flat. The optical illusion is really well done.
Well that's my newest tinplate, best wishes to all
Don