This stereo card was manufactured and published in the U.S.A. by Keystone View Company and copyrighted by Underwood & Underwood in the 1920s. It was made for use in a stereoscope and features a stereoscopic pair of images that would appear to be 3D when viewed through the device.
The photographs in this stereo card depict coal mining - coal strata and miners shoveling and drilling for a blast.
The card is identified by the following serial numbers: P146, P-V20389, and P146-(V20389).
This card is in used but good condition. Please see the photographs for a full description, as the object in the photos is the exact item you will receive. This item will ship wrapped in archival plastic bags to prevent wear during shipping.
Approximate dimensions: 7" x 3.5"