Limited edition of 500 pieces grand seiko watch black ceramic limited edition sbgc219 the collection comprises three versions of which the undoubted star is the limited edition created to mark the tenth anniversary of the spring drive chronograph gmt caliber it is different in both function and design the bezel has a tachymeter and as noted above the caliber 9r96 is specially adjusted for enhanced accuracy the grand seiko blue is matched for the first time with the rose gold tone of t