3M 1865 OVERHEAD PROJECTOR 1800 GREAT CONDITION | eBay
3M 1800 Series Overhead Projector Does Not Come With Bulb - Etsy Australia
3M - Remember the overhead projector? It inspired a way to help make our roads safer. In 1962, 3M's Roger Appeldorn and his team created an overhead projector using a new, lighter
3M Overhead Projector School Library Business Equipment in Indiana, Pennsylvania, United States (IronPlanet Item #8389131)