For many collectors this MarineMaster 300 without the "X" is the holy grail of the tool divers, for this was the last model from Seiko with the "MarineMaster" sign on the dial instead of the X.

Also this model has the DiaShield Case and Bracelet coating, which works really wel. The Grand Seiko 8L35 automatic movement (Hi-beat 4K, 26 Jewels) runs with +1 second in a day so within COSC specification.s The Dual Curved glass with anti-reflective treatment is beautiful, just like the dial, the extreme lumen and the bezel. The watch is in near mint condition and comes as a full set without the rubber strap. 

Real collectors item!