English brass navigational sextant, ca. 1900. 3615 grams, case size = 10-1/2" x 9-1/2" x 6" and sextant = 9-1/2" across. Fine quality sextant signed by Heathen Co., New Eltham, London with 3 original telescopic, optic lenses in original dove-tailed mahogany case marked USSB (for United States Shipping Board) inside of which are May 1918 and Routerdam 1964. Very good condition with original lacquer and lenses, case with original finish with minor service-related scratches and nicks. With photo-certificate. (Estimate: $500 - 750)