Insures the safety of main line switches
Contributors: General Supply Co
Publisher: American Valve and Meter
Published: 1910
Place of publication: Cincinnati
Language: eng
Other titles: Trade catalogues (NLC), Railroad; Catalogues commerciaux (BNC), chemin de fer
Notes: A corporate body and subject index for this collection, and other trade catalogues, is located in the National Archives Reading Room.

Canadian agent: General Supply Co., Montreal.