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Posted By: David

There are 'Pinkerton' postcards-- Pinkerton photos reproduced on the front. As opposed to a real photo, the postcards have a dot structure under a magnifying glass. They come with or without (blank) a postcard back. They were made circa 1918. They aren't nearly as rare or valuable as the actual Pinkerton photos or cabinets (the photos can occasionally be found without the mount), but are vintage and nice postcards.