Cal. 2221 - Lémania 15 CHT nickel-finished lever movement 17 jewels white dial Arabic 1 - 11 numerals with luminous accents luminous Arabic 6 and 12 numerals luminous hands red chronograph hand two engine-turned subsidiary dials for constant seconds and 30 minutes register circular water-resistant-type case screw back engraved with military markings RCAF SERIAL NO. HA-62-342 6W/16 S round chronograph button in the band stainless steel Omega buckle case dial and movement signed