Great Britain. A sextant is a navigation measuring instrument used to measure the height of a star above the horizon in order to determine the geographical coordinates of the area in which the measurement is made.
Production - Keen & Frodsham, Liverpool. These sextants were Purchased by the tsarist government and used both in the Russian Imperial Navy and in the Dobroflot.
A boxed Octant by Frodsham & Keen Liverpool. Ivory scale. Early 1900s.
Bronze, steel, glass. In perfect condition, all lenses are intact. Mailbox size 25*31*25*10 cm, box height 12.7 cm. One fastening loop on the box is missing.