Below is a chart showing various bracelet end links references for Rolex watches, mainly the sports stainless steel models, as many were possibly changed over the years due to wear and tear. This table can help you determine whether the bracelet is original to the watch. There were also different options at the point of purchase in the Authorized dealers, as shown below.
As an example, the picture indicates a Rolex Submariner 16610 bracelet with a code 93250 with “SEL” end links; if you refer to the chart, that code would be correct for a 2002 Submariner, approximately around 2000; all Rolexes came with solid end links. The bracelets without “SEL” end links came with an end link reference code as well as the bracelet code.
The Rolex GMT-Master from the 1675 to 16710 models also have the option of a jubilee bracelet instead of the oyster bracelet, which looked rather well on the GMT.  The bracelet reference was 62510H with end links 550/502B, so not uncommon to see GMT-Masters on the jubilee as well as the oyster.