Here are some details on the Darstaed cars. The bottom is stamped Darstaed.
The litho on the side shows ACE Trains.
The glue holding the window inserts has given way. I think the bodies might be brass? Is that right? That's what it looks like on the inside. There is also a decal bubbling on the frame.
I'm thinking about trying a hair dryer on the decal to see if the bubble will go away. I'm not sure what glue to use for the window inserts. The diaphragms also seem a little distorted, but I can probably live with that.