An unusual large stainless steel two time zone chronograph wristwatch with 24 hours, Universal, 'Aero-Compax' circa 1960

nickel lever movement, 17 jewels, glucydur balance, white dial with Arabic and luminescent baton numerals for 24 hours, luminescent hands, outer minute track, three subsidiary dials indicating constant seconds, 30-minute and 12-hour registers, circular water-resistant-type case with rotating coin-edged bezel calibrated for 24 hours for the second time zone and screw-down case back, case, dial and movement signed

This watch is a later version of the Universal Aero-Compax which was introduced in 1940 and had a subsidiary memory dial instead of the rotating 24 hour bezel.