Known as the "Deluxe Stereoscope, this viewer is the most common of the older designs. This square model was completely re-engineered to allow the consumer to insert the reel directly into the top of the viewer. Stereocraft Engineering created this new design and it remains the basic principle applied to all viewers made ever since then! (Author's Note: This viewer was still being distributed in 1956 although it was no longer being manufactured at that time.) It was produced at both the U.S. and the Belgium plants. Because this viewer was in production for almost 10 years, there are many differences that accompany this basic Bakelite viewer. Some of those we have found include the following: Color Variations • Black • Dark Brown • Light Brown • Black/Brown speckled • Two-Tone Brown Printing Variations • • Sawyers name and patent information outlined in box at bottom of back (seam down middle of viewer) • Sawyers name and patent information not outlined Lever Variations • • Advance lever in brass • Advance lever in aluminum • Advance lever in chrome Eyepiece Variations • • Seven "steps" leading to top of viewer • Six "steps"; greater distance from top of viewer to first "step" Rivet Variations • • Rivets are concave • Rivets are inset • Rivets are pin-pointed From a pet and smoke free home