Omega - Seamaster 300 Omega Master Co-Axial 41 mm - Steel and Yellow Gold Watch 233.20.41.21.01.002 black and stars 45 mm titanium case with

45 mm titanium case with steel gadroons

Alarm signals abrupt changes in pressure

night blue guilloched dial with powdered gold hour markers

titanium bezel

Omega - Seamaster 300 Omega Master Co-Axial 41 mm - Steel and Yellow Gold Watch 233.20.41.21.01.002 black and stars 45 mm titanium case with41 mm stainless steel case, transparent back, self locking crown, 18K yellow gold unidirectional rotating bezel, sapphire crystal with anti reflective treatment inside, black dial with 18K yellow gold hands, caliber 8400 self winding movement, approximately 60 hours of power reserve, stainless steel and 18K yellow gold bracelet. Water resistant to 300 m (1000 ft).