Model F - View-Master Viewer - vintage - 1958-1966
The last model of bakelite viewers produced by View-Master, 1960s. It's an internally lighted viewer. The image is magnified 5.5 times, same as the Model C and Model E, but unlike the model C and E, the Model F is self contained, lighted, not requiring a separate light source.
NOTE: There is a simple but necessary method in closing the Model F viewer upon changing batteries and/or bulb. Without this method of closure, internal nibs can be broken off, forever preventing complete closure of the viewer. A copy of the original illustrated instructions are included to demonstrate this simple, proper closure method
Also, this same improper closure of the Model F viewer often caused the back half of the bakelite viewer to crack at the bottom-
3Dstereo offers 'Collector Grade' Model F viewers without chips nor cracks in the bakelite case (including the base of the viewer), no formal battery corrosion, and equally important, with the internal nibs completely intact.