The Fortis B-47 is versatile and provides highest comfort and sense of style to the wearer. The Fortis B-47 Calculator can display up to three additional time zones with its unique dial. This offers a high level of individuality. The Fortis B-47 World Timer GMT also shows three time zones. Its modern design and the high quality dial make it unique and a highlight for every Fortis fan. These great world time watches are operable through the rotating bezel, a rotating disk on the dial, and a central index.