1939 Catalog D-10: Lenses, Prisms and Mirrors
Rochester, NY: Bausch & Lomb, (1939). Wraps. 11 x 8.5 inches, wraps, very good, light wear and soil, tanning, to wraps. 16 pp, illustrated. Code on rear wrap is XII-39 - probably Dec. 1939. Catalog of various lenses: plano convex, double convex, concave, flat cylinder, meniscus, projection condensers, various prisms.....