Let's start with the movement, this Grand Seiko utilizes its award winning Hi-Beat GMT incorporating Calibre 9S86. Most automatic watches have beat at a frequency of around 21,600 (6 beats per second) or 28,800 (8 beats per second) which is considered average rate, however Hi-Beat movements beat at a frequency of 36,000 (10 beats per second). With the higher beats, the movement has a higher shock resistance, but also requires more energy and usually less power reserve.
This is where the incredible Calibre 9S86 comes into play, allowing for 55 hours of Power Reserve and holding multiple functions from hour, minutes, seconds, date and GMT second time zone (in gold hand) Another amazing feat of the Calibre 9S86 is that its accuracy is +5 to -3 seconds per day.
The dial as seen here is a special decorated deep green dial which can appear a range of green colored depending on the light hitting the surface. Upon looking closer, you can see Grand Seiko's promise to precision with their highly polished "zaratsu" technique on the case to create mirror like surfaces throughout the case, bracelet as well as inside the hands and hour markers.
This watch does not include any lume, but has never been an issue from the hands and hours having even faint light boucing off the highly polished edges allowing it to be read in low light conditions. The crown also is very comfortable to wind and can also be screwed down to allow a water resistance of 10 bar or 335 feet. The case size sits comfortably at 40mm with a thickness of 14mm, a little thicker than traditional watches, but given the additional GMT function, it doesn't add up too much.
You can find the watch here: