Pair of mid-century vintage fresnel lenses for industrial studio task lights

Pair of round glass bulls eye fresnel lenses for machine-age studio lamps, like the Mole-Richardson Solarspot lights. These lenses measure 5-3/8" in diameter (across) and 3/8" thick overall with a outer mounting lip of about 3/16" thick. These lenses are marked "Prescolite". They are textured on the flat backside (facing the lamp). They are in nice condition with no major chips, but there are a few tiny nicks and flea bites.

We have several pairs of these fresnel lenses available.