The SBGM221 is probably the dressiest GMT watch that Grand Seiko currently makes and was almost certainly inspired by the original 1960 Grand Seiko. It features a classic cream dial accented by a bright blue GMT hand. What's a GMT hand, you ask? Well, a GMT hand can be used to track a second time zone, traditionally the time zone you live in. The hour hand is independent, meaning it can be changed without disrupting the minutes, seconds or GMT hand. Thus, when you fly to Japan, for instance, you can change the hour hand to your local time zone easily and your blue GMT hand will still tell you what time it is where you're from. The GMT hand reads in 24 hours, as opposed to 12, so you even know whether it's AM or PM there.
The movement powering the SBGM221 is the in house 9S66, one of the most accurate and sophisticated movements in the world. The 9S66 features a 72 hour power reserve, 80% longer than the industry average, and is rated for accuracy that exceeds a Swiss chronometer.