Glass Slide from The Conquering Power

This is a glass slide from the film, The Conquering Power from 1921. Glass slides were used in movie theaters as a still trailer to preview upcoming films. It was placed in front of the movie camera so that it was reflected on the screen. These were often hand painted, so the same slide may now be found in many color variations. These are difficult to find with out cracks, chips or breaks, they are fairly fragile. The more colorful ones in good shape can be quite valuable. I am still looking for this one myself. I find these to be unique movie collectible items, this was just one more marketing tool to promote the film.