Grand seiko watch mechanical hi beat gmt seiko watch corporation is pleased to announce its first ever hi beat gmt it has all the features of the existing caliber with the addition of a 24 hour gmt hand with easy hour adjustment every grand seiko watch showcases the pure essentials of watchmaking with craftsmanship and high technology manufacturing being harmonised to create watches that are as accurate as legible as comfortable and as durable as can be achieved this hi beat gmt movemen