This is a View Master^™ toy slide viewer. It was developed in the United States and hit the market in 1939, then grew in popularity during the late 1960s. The cardboard disc contains 7 pairs of slides, each pair representing an object visible to the eye in 3D. When you pull the trigger, the disc turns to display the 7 views in sequence. This viewer depicts the Sea-Doo^® GTS, GTX, XP, SP, SPI and SPX personal watercraft models from 1994, as well as the Sea-Doo^® Explorer^® boat.