Questions about the 726 Berkshire

Does anyone know about their pulling power? I am just being curious. And is their air whistle made out of diecast metal, or plastic?

I think that this is correct: The 726 pulled a 2426W with a cast-zinc WS-125 whistle until it was dropped after 1949. The 1950 773 used the same tender with a plastic WS-125 whistle.

I use the tender from a 726 with my 1964-66 773 in place of the 773W.

That’s cool, I can’t wait til I find a 726.

Well, you’ve got a few choices. They changed almost every year they were made in some fashion.

Rob