That's the B-1

The B-1 Business Car was built in 1880 as a coach #33. It was converted into a private car and used in the Presiden't Train for Railroad Officials, mining Tycoons and Easter financiers. This car carried President Taft and was at the 1909 opening of the Bureau of Reclamation Project in Gunnison. The B-1 was the "Commissary Car" of the President's Train. It contains a coal stove with 6 burners, a complete working galley kitchen, cupboards and ice chests, 3 swing down upper berths & 2 lower births.
This was copied from the Friends of the 169 brochure and news about the project can be found below....