Plastic lens replacement for Holmes stereoscope Wedge lens pair 1.5 inches

Lenses for Stereoscopes (Plastic) Plastic lens replacement for Holmes stereoscope Wedge lens pair 1.5 inches These lenses are good lens for making a home made Holmes Stereo scope for viewing stereocards and also act as a good replacement for lenses in the stereoscopes we offer.  These include the stereoscope kit and the pedestal stereoscope.  These lenses are prismatic (wedge-like) which is crucial for viewing Holmes style stereocards.  They are 1.5" square.  These will not fit many older stereoscopes without modification.