Grand Seiko Sport Collection 9F Quartz GMT 39mm Watch lifestyle hover The case diameter of 44mm FeaturedBlackBay The case diameter of 44mm ensures a bold and striking presence on the wrist The sun brushed dark green dial is distinguished by a date window at 6H and a Small Seconds subdial featuring an 18K white gold ring The high precision (+ 10 seconds a year) of Caliber 9F86 is not compromised when the time zone is changed as the watch continues to keep perfect time even when the crown is pulled out and the hour hand is moved to adjust the local time Calibre 9F was developed to allow the creation of the ultimate quartz watch and is now widely recognized as one of the finest quartz calibres in the world