1910 12 WALKER Electric Truck Walker Balance Gear Electric Trucks Automobile Maintenance & Manufacturing Co. Chicago, ILL AUTOMOBILE TRADE JOURNAL December 1910 6.25″x10″ page 197

1910 12 WALKER Electric Truck Walker Balance Gear Electric Trucks Automobile Maintenance & Manufacturing Co. Chicago, ILL AUTOMOBILE TRADE JOURNAL December 1910 6.25″x10″ page 198

1910 12 WALKER Electric Truck Walker Balance Gear Electric Trucks Automobile Maintenance & Manufacturing Co. Chicago, ILL AUTOMOBILE TRADE JOURNAL December 1910 6.25″x10″ page 199

1910 12 WALKER Electric Truck Walker Balance Gear Electric Trucks Automobile Maintenance & Manufacturing Co. Chicago, ILL AUTOMOBILE TRADE JOURNAL December 1910 6.25″x10″ page 200

1923 10 20 WALKER Electric Truck Watch for these Disc-Wheel Trucks WALKER VEHICLE COMPANY Chicago, ILL The Literary Digest October 20, 1923 8″x11.75″ page 69

1923 9 15 WALKER Electric Truck Save Half! Use Electric Power WALKER VEHICLE CO. Chicago, ILL The Literary Digest September 15, 1923 8″x11.5″ page 69