Model 643, Dump, Hoover Dam, 3/4 Front View, Neg and

Model 643 Dump, Hoover Dam Neg and

Model 643, Dump, Hoover Dam, 2 Trucks Neg and

Model 643, Dump, Hoover Dam, Rear View

Model 643, Dump, Hoover Dam Neg and

Model 643, Model 643- SW 410, Bowman Dairy Co Chicago Neg and

Model 643, Model 643 -SW410 Bowman Dairy Co Chicago , Neg and

WA-122, Putnam Oil Co Inc , Covington Pa Neg and

Model 643, Hoover Dam Neg and

Model 643, Hoover Dam Neg and

Model 643, Hoover Dam Neg and

Model 643, Hoover Dam Neg and

Model 643, Hoover Dam Neg and

Model 643, Hoover Dam Neg and

Model 643, Hoover Dam Neg and

Model 643, Hoover Dam Neg and

Model 643, Hoover Dam Neg and

Model 643, -SW410, Building Dam Neg adn

Model ,Hoover Dam

Cutaway Transmission rear high View Neg only

10C Rear Axle Full view Neg and

10-C, Rear Axle, Full View Neg Only

10C Rear axle

10-C Rear Axle, Close up ofPinion shaft and barrings Neg and Print

Mofel 643, Concrete Mixer, Hoover Dam