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16760 dials all say GMT-MASTER II. This one says GMT-MASTER only, so it's either from a 16700 or a later 16750. The spidering and the 31-minute marker being between the W and I of SWISS rather than aligned with the I or between the I and the S makes it more than likely a 16750 ca. 1986 like this one: https://www.chrono24.com/rolex/gmt-master-spider-dial-1986--id7565882.htm
16750 was produced prior to the 16700.