Photographic Lenses, Bausch & Lomb Optical Co., (Rochester, NY), dated 1920, ~6½"x9⅝", 64pp
Loose within its pages, this catalog (1920) came with the January 2, 1922 and May 20, 1924 price lists. Does this mean that Bausch & Lomb issued new prices on a two year schedule during these years?
