The Wharton patent safety railroad switch
Subtitle: the main track entirely unbroken and continuous
Publisher: Wharton R.R. Switch Co.
Published: 1880
Place of publication: Philadelphia
Language: eng
Notes: Caption title (p. [4]).

Signed: Abraham Barker, pres., Wm. Wharton, Jr., supt., of Wharton R.R. Switch Co.