Grand Seiko Sport Collection 9F Quartz GMT 39mm Watch alt text ai The screw back case is topped which are set on The screw back case is topped with a mineral crystal exhibition window to showcase the automatic movement powering the timepiece embody the courage The GMT hand is clearly differentiated in design from the hour and minute hands and the 24 hour dial ring is divided into two 12 hour sections to allow AM and PM to be easily distinguished 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