Hi! Thks for all replies! Yes! The GMT is adjustable. The opposite direction of the date adjustment is the GMT adjustment. Well, I presumed is DG3804B after comparing the movement pictures( I maybe wrong ). I wanted to change the movement because sweeping second handing is somewhat jumpy. I prefer the 28,800bph which is very smooth sweeping motion. Just need to know if all the experts here are able to help on the swap.