The University of Arizona College of Optical Sciences
Cross-eyed stereo pair of some of one of the very earliest melts of Pyrex, circa 1935.
GOMZ Sputnik,dual 75 mm f/4.5 anastigmat,Ultrafine Xtreme ASA400 120 roll film enlarged to 8x8" (with margins, not shown here - making it more like 7x7".) This presentation is for right image - left eye.
full exif