Yours is the original GMT Master. The GMT Master II allows the GMT hand and the regular hour hand to be set differently but not on your older model. On yours, the regular hour hand the the GMT hand are fixed so that if the triangle on the rotating bezel is at the top, the GMT hand will indicate local time. To indicate time in a 2nd timezone, rotate the bezel to orient the time to the GMT hand. There's a copy of the original instructions posted at: http://www.rolexforums.com/showthread.php?t=45269
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Yours is the original GMT Master. The GMT Master II allows the GMT hand and the regular hour hand to be set differently but not on your older model. On yours, the regular hour hand the the GMT hand are fixed so that if the triangle on the rotating bezel is at the top, the GMT hand will indicate local time. To indicate time in a 2nd timezone, rotate the bezel to orient the time to the GMT hand. There's a copy of the original instructions posted at: http://www.rolexforums.com/showthread.php?t=45269