The underside is stamped with the Marx logo and U.S. Patent 2,812,869.
NICE! Marx Lumar Contractors Mobile Boom Crane Pressed Steel 16"
1940s Vintange Marx Lumar Contractors Front Load Dump Truck / Pressed Steel /
Marx Lumar Contractors Mobile Boom Crane Pressed Steel 16"..Excellent
Vintage Marx Pressed Steel Steam Shovel Lumar Contractors pair of tracks