FORTRESS GMT BLUE
The Fortress GMT is equipped with a mechanism for correcting the hour hand by means of the crown (patented mechanism). Located on the left side of the case, the pusher has been completely redesigned to become the only pusher allowing the hour hand to be moved by 1 hour. This makes it easy to update the time while on the move. Each Graham watch is water tested to 300 feet (100 meters/10atm).
This model has a GMT hand that allows the second time zone to be read simultaneously. This provides a technical answer for people who travel constantly, juggling time zones.
📄TECHNICAL SHEET AVAILABLE HERE