SIDUNA M-3440-051010 Bi-Compax SELFWINDING
iso rated: 100M/330ft.
Based on the 1973LEMANIA standard-issue military chronograph produced for the Swedish Air Force, or Svenska Flygvapnet, of which a CIVILIAN version was produced via their sister company TISSOT, that used a case design by Ervin Piquerez SA Ref# 817 that originated in 1968 which was used on Jack Heuer's 1968 Autaviaand the Breguet Type 20.