Worker moving packages of rubber product, ca.1945

Photograph of a worker moving packages of rubber product, ca.1945. At center is a worker wearing pants and a dark collared button-down shirt crouched down amidst stacks of some sort of rubber product. He is facing forward, looking down at a package, and is preparing to lift it. Each package has "GR-S Rubber Preserve Co." and a code number written upon it and appears to be enclosed by some sort of heavy paper material.