Tinplate windup set - what is it?

looks like Hafner to me.

It's sort of an American Flyer Empire Express set.  The tender and the car are from one of those sets.  The car has been modified with the insertion of a floor - based on the picture I'm guessing this was done because the "couplers" which are usually part of the one piece sheet metal stamping are missing and what was left of them looks like it was fastened to the floor.  The tender is designed to hold a battery which powered the headlight on the engine.

  I do know that the Empire Express sets came with both sheet metal and cast iron superstructure engines and the engine superstructure looks like it is Flyer but I'm not sure about the motor.

Robert has it right, it is an American Flyer.  Your locomotive appears to be missing the socket and bulb for the headlight.  Here is a picture of a couple of similar AF locos, the one on the left belongs to my friend Rick and has the headlight.  The one on the right is mine... I got the shell in a box of junk, it was missing the headlight socket.  I machined a headlight out of brass and powered it with a Hafner motor.  Yours appears to have the original motor.

quote:

The car has been modified with the insertion of a floor - based on the picture I'm guessing this was done because the "couplers" which are usually part of the one piece sheet metal stamping are missing and what was left of them looks it was fastened to the floor.

All three cars are constructed the same. The floors were manufactured. The embossed ribs are precisely done, and are identical. The paint on the floors match the paint on the sides of the car.  I had one car apart because it was bent. The cars have absolutely no structural integrity without the floor. The rest of the car body is all one piece: roof, sides, and ends. One each end of the car, one corner is folded, and the other corner is tabbed, with the tabs on the surface, not inserted into slots. The hook (points up) and loop "couples" are also part of the car body stamping.

The hooks and loops are inserted through a slot in the floor and bent over, no fasteners or solder.

Thank you for all the information!

C.W. that's interesting and it would suggest Flyer made them two different ways. I have several of those cars and none of them have a floor.  The hook and the loop are part of the single stamping of the car body.  As for structural intergity - you're right - they are about as fragile as they can be and I'm surprised any have survived....so I guess I'll have to go out there and see if I can find some with the floors.  Thanks for the info.