Underwood & Underwood Stereoview Kilns Firing Terra Cotta Pieces Early 1900s

The image shows several workers attending to the process, surrounded by stacks of terra cotta pieces laid out on the ground, and large circular brick kilns in the background. The stereoview is printed on cardboard and features two nearly identical black and white images intended for viewing through a stereoscope to create a 3D effect.

eBay