Grand Seiko Hi-Beat GMT Four Seasons "Summer" SBGJ249 black-friday The OMEGA Master Chronometer calibre

The OMEGA Master Chronometer calibre 9900 at the heart of this timepiece can be seen through the transparent caseback

5 stainless steel screws with polished heads

La Grande Classique de Longines has played a major role in forging the reputation of the winged hourglass brand

the characteristic features of the dial

Slightly slimmer than the standard Diver 300M models thanks to the doming of the sapphire-crystal glass

Grand Seiko Hi-Beat GMT Four Seasons "Summer" SBGJ249 black-friday The OMEGA Master Chronometer calibreIn Japan, each of the four seasons of the year is experienced in six phases and all have their own distinct characters. The subtle changes from one to the next bring the nature of time ever closer to our senses. Each GMT watch in this new collection celebrates one of the years 24 seasonal phases or "sekki." Representing "Summer" is SBGJ249. High summer approaches and, at last, the rainy season ends. In Shsho, the warm wind creates delicate ripples in