Builder photo of Construction Number 1166 showing right side of Pittsburg Iron Ore Company 60 Ton Two Truck Heisler Geared Steam Locomotive Number 1 at Erie, Pennsylvania in September 1909. This locomotive was used in mining iron ore at Mountain Iron, Minnesota. Photograph by Schauble.

Builder photo of Construction Number 1521 showing right side of Pike County Collieries Company 36 Ton, Two Truck Heisler Geared Steam Locomotive Number 4 at Erie, Pennsylvania, July 1925. This locomotive was used for mining coal near Oakland City, Indiana. Photograph by Schauble.

Builder photo of Construction Number 1271 showing right side of 36 inch gauge Pickens and Hacker's Valley Railroad 36 Ton Two Truck Heisler Geared Steam Locomotive Number 4 at Erie, Pennsylvania, January 1913. This company was controlled by the Mayton Lumber Company and the locomotive was used for logging near Pickens, West Virginia. The locomotive is seen on Lake Shore and Michigan Southern Railroad flat car LS&MS D36126. Photograph by Schauble.

Builder photo of right side of Construction Number 1468 showing Phenix Marble Company 22 Ton, Two Truck Heisler Geared Steam Locomotive Number 1 at Erie, Pennsylvania, November 1922. This locomotive was used for quarrying marble near Phenix, Missouri. Photograph by Schauble.

Builders photo of Construction Number 1593 showing right side of Phelps Dodge Corporation 90 Ton, Three Truck Heisler Geared Steam Locomotive Number 116 at Erie, Pennsylvania, November 1929. This locomotive was used for copper mining on the Copper Queen Branch in Arizona. Photograph by Schauble.

Builder photo of Construction Number 1216 showing left side of Perry Iron Company 52 Ton Two Truck Heisler Geared Steam Locomotive Number 2 at Erie, Pennsylvania, February 1911. This locomotive was used in the iron works at Erie, Pennsylvania. Photograph by Schauble.

Builder photo of Construction Number 1250 showing right side of Perkins Land and Lumber Company 26 Ton Two Truck Heisler Geared Steam Locomotive Number 1 at Erie, Pennsylvania, March 1912. This locomotive was used for logging near Kelso, Arkansas. Photograph by Schauble.

Builder photo of Construction Number 1509 showing right side of Penrod-Jurden Company 32 Ton, Two Truck Heisler Geared Steam Locomotive Number 8 at Erie, Pennsylvania, December 1924. This locomotive was used for logging near Tensas, Louisiana. Photograph by Schauble.

Pennsylvania Railroad Interlocking control tower at Pittsburg, Pennsylvania, on July 13, 1964. Photo by J.M. Fredrickson. Other Subject Classes: control tower

Pennsylvania Railroad diesel locomotive 6893 at Pittsburg, Pennsylvania on July 13, 1964. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive