DescriptionBasic Optics and Optical Instruments. Prepared by Bureau of Naval Personnel. NY: Dover, [1969]. Reprint of 1966 United States Navy Training Publications Center "Opticalman 3 & 2", Navy Training Course NAVPERS 10205. pp. 480, illustrated. Although naval equipment, it show some items similar or identical to ones manufactured by Keufel & Esser Company of Hoboken such as compasses, sextants, azimuth rings, etc. 8vo softcover