Omega Gents Constellation Chronometer Watch - 38 mm Brushed Steel And Red Gold Case - Silver Diamond Dial - 123.20.38.21.52.001 Classic caliber 30-255 PS manually wound

caliber 30-255 PS manually wound movement with small seconds

tachymeter scale

Water resistant to 300 m (1000 ft)

40 mm 18K white gold case

Omega Gents Constellation Chronometer Watch - 38 mm Brushed Steel And Red Gold Case - Silver Diamond Dial - 123.20.38.21.52.001 Classic caliber 30-255 PS manually wound38 mm brushed stainless steel and 18K red gold case, transparent back, domed scratch resistant sapphire crystal with anti reflective treatment both sides, silver dial with diamond hour markers, self winding chronometer Omega 8500 movement with Co Axial Escapement, date, and seconds, approximately 60 hours of power reserve, stainless steel and 18K red gold bracelet. Water resistant to 100 m.