Citizen BN4021-02E ProMaster Eco-Drive Altichron Wrist Watch

Correctable with ± 3000 ft (25 ft unit) * Correct difference between actual altitude and measured altitude due to barometric pressure fluctuation etc. 1989 Revived evolving the concept of Articron released at the birth of Promaster. Eco-drive watch equipped with an altimeter capable of measuring up to 10,000 m and an electronic azimuth meter. It can measure from 10,000 m above the altitude of every mountain on earth to a depth of -300 m above sea level. Simultaneous display of time and bearing Measurement function. One push function to indicate bearing during altitude measurement. Measurement of movement altitude is possible with a rotary ring of the dial. (Screw lock crown at 2 o'clock position) Dial board and needle design with vivid color scheme with excellent visibility.