The Hafner 2000 engine was post war from the 1940's to 1951. It is the one engine that was carried over into the All Metal Products Company Wyandotte line when they took over Hafner trains in 1951. They kept it much the same at first just added the Wyandotte name to the livery but then made changes over the following years, although the basic loco remained the same.
This is a Hafner model, brought out postwar and lasting until the end of Hafner trains under that name.
This example is shown with a type Vb (3 color) tender and it should have a type Va (all black) tender but I have not been able to find one of those but I keep looking.
Happy Steam Sunday everyone. Best wishes for the Holidays.
Don