It´s a D-class engine. 333 of them were produced 1925 - 1943. The first 134 with bodies in wood and from 1933 they were made in steel. This was the swedish standard enginge used both for passenger- and freight trains until the Rc-class took over in the sixties.
I have made the model from a plastic body which I have painted and detailed to what it looks like now.
Below, a picture of D101 which you can see in the Swedish Railroad Museum.
