Walter A. Zelnicker Supply Co. : Catalogue 1904 by Walter A. Zelnicker Supply Co. https://archive.org/details/WalterAZelnickerSupplyCoCat1904/page/n3/mode/2up
H. Channon Company : Machinery and General Supplies : Catalogue No. 50 1910 by H. Channon Co. https://archive.org/details/HChannonCoCatalogNo501910/page/n1/mode/2up
Hill, Clarke & Co. : Catalogue of Machine Tools 1893 https://archive.org/details/HillClarkeAndCoCatalogue1893/page/n5/mode/2upHill
F. W. Reynolds & Co. : Illustrated Catalogue of Builders' Machinery and Appliances : August,1876 https://archive.org/details/FWReynoldsCatalogue1876/page/n3/mode/2up
