Keystone Eye Excercise stuff

[P3D Derek Gee <73157.2172@xxxxxxxxxxxxxx>]

Michael asks:
>I saw an odd stereoscope in an antique shop today. It was a Keystone 
>Model #50, constructed of metal (a chrome support) and a reddish-brown 
>bakelite hood. It was made in Meadville, Pa. in 1950, according to the 
>instruction book.
>
>The most interesting thing about the 60 pictures (packed in the original, 
>corrugated cardboard box) was that they were perfectly *flat*, missing 
>that curvature that characterizes earlier runs of the same pictures 
>(which happened to be the "eye exercise" pictures).
>
>Has anyone else on this list seen such a late run of the Keystone cards?
 
If I'm not mistaken, Keystone-MAST continued to make stereo stuff for the
medical/optical market until the late 60's/early 70's when they shut down.
Just a fuzzy rememberance on the date, maybe somebody else out there knows
more...
                                      Derek Gee
                                      73157.2172@xxxxxxxxxxxxxx


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