Tudor Submarine FXD → "Super ice blue luminous effect, coated with a new high-performance X1 level Swiss Suer-LumiNova luminous coating (only M on the market uses this luminous material for the first time), ensuring that it can be used in any environment. It is clear and easy to read and stays on for a long time. In the dark, the blue light shows the elegance of its navy blue dial and snowflake needles. M focuses on the original luminous effect, which has never been seen on the market before; even the top Rolex version cannot achieve this. The luminous effect cannot achieve such a long-lasting luminous time (luminescence in the dark for more than 10 hours." Diameter 42MM, thickness 12.75MM, material grade 5 titanium and zirconium oxide ceramic rotating ring. The movement is imported from Citizen's specific 8N-24 sunless movement. Attached Comes with a pair of fluororubber embossed plaid strap with titanium buckle.,