Antique Stereoscope Card Viewer Keystone Monarch circa Early 1900s 34 View Cards For Sale

This antique stereoscope card viewer from the early 1900s by Keystone Monarch comes with 34 view cards featuring various themes such as travel, people, history, and advertising. Made of cardboard, paper, and metal, these original cards showcase landscapes, cityscapes, and actors, providing a unique glimpse into the past. With a brand and publisher known for producing high-quality stereoscopic views, this collectible item is a valuable piece of history from the early 20th century.