London, J.H. Dallmeyer Limited, [early 1920s].
Octavo ,  leaves with numerous illustrations.
Overlapping card covers (a looseleaf folder with metal fasteners) slightly marked and bumped; leading edge of the first leaf slightly chipped and marked; a very good copy.
J.H. Dallmeyer Limited, 'Manufacturers and Patentees of Photographic, Kinematograph Lenses and Apparatus', was established in 1860. The introduction mentions its high standards 'for the last 60 years' and refers to the 'Mount Everest Expedition' (presumably the first British attempt in 1922). Loosely inserted is another small catalogue of lenses from Dallmeyer (small octavo,  pages, not before 1924).