| Here is the illustration on page 21 of the "Pennsylvania Railroad Altoona Machine Shops Construction Number List: 1866-1904." It was compiled by Joseph D. Lovell, and published by the Library Of American Transportation during 1984. Partial Caption: "PRR No. 940 was built in December 1873 and is a representative of Class H, a 0-6-0 separate tender design for switching service." |