Grand Seiko SBGR311, Grand Seiko Caliber 9S, Image source: fratellowatches.com
As we've discussed in our Grand Seiko posts, the craftmanship of this brand goes in the luxury niche in its whole course, but when it comes to its caliber 9S series, there’s a whole new story going on. Let’s start by saying that the whole Grand Seiko caliber 9S family, basically built on the updated version of 5200 caliber is called Modern Grand Seiko Mechanical. Now, let’s see why. . .