I have for a long time been a great admirer of the Grand Seiko watches. These watches aren’t just aesthetically pleasing but are superior technical instruments. Seiko really gets into the fine details with this line, and the Grand Seiko Hi-Beat 36000 Professional 600m Divers is no exception. In fact, when it comes to diving watches, Grand Seiko is in high demand among diving professionals. This timepiece is the very first diving watch from Grand Seiko that is made in titanium. This version of titanium is coined high intensity titanium by Seiko. The polishing used on the case and bracelet uses the exquisite Zaratsu method.
The case of this watch is quite imposing with a diameter of 46.9mm, and case thickness of 17mm. The wrist presence on this is quite something, and gives the wearer a clear look at the time reading even underwater. This is also helped by the convex sapphire crystal, and anti-reflective coating on both sides. The case back, and crown positioned at 4 o’clock are both screw locked providing this watch with the 600 meters water resistance that is suitable for saturation diving. The Grand Seiko Hi-Beat 36000 Professional 600m Divers Limited Edition comes with an additional extra strength silicone strap for a change in the look of the watch. The bracelet is secured to the wrist using a triple deployant clasp. This model is fitted with a unidirectional bezel for measuring elapsed time – some would say a key feature in the anatomy of a diving watch.
This watch is offered in two dial versions – black (ref # SBGH255), and blue (ref # SBGH257). Each iteration features a three hand readout with luminous hands and indexes. The date aperture is located at 4 as well, which looks like it flows from the crown.
Powering this watch is the self-winding mechanical movement caliber 9S85. What is special about this movement is the magnetic resistance rated at 16,000 A/m, which is stronger than the Rolex Milgauss, and even the Omega Aqua Terra. Another amazing feature is the high frequency of this movement, which matches the famed El Primero movements from hallowed watchmaker Zenith coming in at 36,000 alternations per hour. This model boasts a power reserve of 55 hours, and is accurate to -3/+5 seconds per day. For those au fait with chronometer certification their benchmark is -4/+6. This Grand Seiko model therefore represents a higher level of accuracy than what is the standard for their Swiss counterparts. The Grand Seiko Hi-Beat 36000 Professional 600m Divers is limited in its production to 500 pieces worldwide.