Micrometer sextant made by Filotecnica, Milan, Italy, 1917-1943

micrometer sextant

Micrometer sextant, made by Filotecnica in Milan, Italy between WW I and WW II. Greater accuracy was achieved by the use of the continuous acting micrometer adjustment of the index arm over that of the previous tangent screw adjustment. Similar to well-made sextants in use today.