Photo of a Heisler geared locomotive motor assembly at Erie, Pennsylvania. Photograph by Schauble.

Photo showing the slide valve end of a Heisler geared locomotive motor assembly for use on a diamond type frame at Erie, Pennsylvania. Photograph by Schauble.

Photo showing the piston end of a Heisler geared locomotive motor assembly for use on a diamond type frame at Erie, Pennsylvania. Photograph by Schauble.

Photo showing the slide valve end of a Heisler geared locomotive motor assembly for use on a diamond type frame at Erie, Pennsylvania. Photograph by Schauble.

Photo showing various parts for Heisler geared locomotives at Erie, Pennsylvania. Photograph by Schauble.

Photo showing firebox grate for wood burning Heisler geared locomotives at Erie, Pennsylvania. Photograph by Schauble.

Photo showing firebox grate for coal burning Heisler geared locomotives at Erie, Pennsylvania. Photograph by Schauble.

Photo showing gears, line shafts and universal couplings for Heisler geared locomotives at Erie, Pennsylvania. Photograph by Schauble.

Photo showing various parts for Heisler geared locomotives at Erie, Pennsylvania. Photograph by Schauble.

Photo looking down on a Heisler geared locomotive truck with gear covers and bolster removed at Erie, Pennsylvania. Photograph by Schauble.

Photo taken from the side of a Heisler geared locomotive truck at Erie, Pennsylvania. Photograph by Schauble.

Photo looking at the underside of a Heisler geared locomotive truck showing the brake cylinder and brake linkage at Erie, Pennsylvania. Photograph by Schauble.

Photo taken from the side of a Heisler geared locomotive truck with one wheel raised showing its flexibility on uneven trackage at Erie, Pennsylvania. Photograph by Schauble.

Photo of a Heisler geared locomotive truck with the gear cover removed. Photograph by Schauble.

Photo of a Heisler geared locomotive truck with the gear cover removed at Erie, Pennsylvania. Photograph by Schauble.

Builders photo of Construction Number 5001 showing right side of Heisler Locomotive Works 60 ton Diesel Electric Locomotive at Erie, Pennsylvania, 1931. Photograph by Schauble.

Photo of Construction Number 5001 showing right rear of Heisler Locomotive Works 60 ton Diesel Electric Locomotive at Erie, Pennsylvania, 1931. The locomotive is undergoing performance testing by pulling a string of loaded hopper cars with testing by New York Central Railroad dynamometer car Number X8006 at Erie. Photograph by Schauble.

Photo of Construction Number 5001 showing officials posing by right side of Heisler Locomotive Works 60 ton Diesel Electric Locomotive at Erie, Pennsylvania, 1931. The locomotive is undergoing performance testing by pulling a string of loaded hopper cars with testing by New York Central Railroad dynamometer car Number X8006 at Erie. Photograph by Schauble.

Builders photo of Construction Number 5001 showing right front of Heisler Locomotive Works 60 ton Diesel Electric Locomotive at Erie, Pennsylvania, 1931. Photograph by Schauble.

Photo of Construction Number 5001 showing right front of Heisler Locomotive Works 60 ton Diesel Electric Locomotive at Erie, Pennsylvania, 1931. The locomotive is being demonstrated at the Hammermill Paper Company at Erie. Photograph by Schauble.

Photo of Construction Number 5001 showing left front of Heisler Locomotive Works 60 ton Diesel Electric Locomotive at Erie, Pennsylvania, 1931. The locomotive is being demonstrated at the Hammermill Paper Company at Erie. Photograph by Schauble.

Photo of Construction Number 5001 showing right side of Heisler Locomotive Works 60 ton Diesel Electric Locomotive at Erie, Pennsylvania, 1931. The locomotive is being demonstrated at the Hammermill Paper Company at Erie. Photograph by Schauble.

Photo of Construction Number 5001 showing left front of Heisler Locomotive Works 60 ton Diesel Electric Locomotive at Erie, Pennsylvania, 1931. The locomotive is being demonstrated at the Hammermill Paper Company at Erie. Photograph by Schauble.

Photo of Construction Number 5001 showing right side of Heisler Locomotive Works 60 ton Diesel Electric Locomotive at Erie, Pennsylvania, 1931. The locomotive is being demonstrated at the Hammermill Paper Company at Erie.

Photo of Construction Number 5001 showing left side of Heisler Locomotive Works 60 ton Diesel Electric Locomotive at Erie, Pennsylvania, 1931. The locomotive is being demonstrated at the Perry Iron Company at Erie.

Photo of Construction Number 5001 showing left side of Heisler Locomotive Works 60 ton Diesel Electric Locomotive at Erie, Pennsylvania, 1931. The locomotive is being demonstrated at the Perry Iron Company at Erie.

Photo of Heisler Locomotive Works horse drawn parade float for parade at Erie, Pennsylvania. Photograph by Schauble.

Photo looking down on a Heisler narrow gauge outside frame geared locomotive truck with gear covers and bolster removed at Erie, Pennsylvania. Photograph by Schauble.

Photo looking down on a Heisler three truck locomotive being assembled with motor installed and waiting for the boiler at Erie, Pennsylvania. Photograph by Schauble.

Photo looking down on a Heisler two truck locomotive with a diamond type frame being assembled with motor installed and waiting for the boiler at Erie, Pennsylvania. Photograph by Schauble.