Welcome to GMTMaster1675.com, an online reference dedicated to the Rolex GMT Master 1675. Over the past decades, the GMT has risen with the popularity of vintage watches to become an icon in its own right. Many collectors, like myself, found themselves entranced by the history and beauty of the 1675 but were daunted by the number of variations over its long production run. After having a fair number of examples pass through my hands, I thought that sharing what I’ve learned could serve as an homage to those who began vintage Rolex scholarship. With the help of many others, to whom I am indebted, this site was borne.

This site is intended to serve as a collector’s reference. The estimations and conclusions made here are empirical and not definitive. As we learn more about vintage Rolex, the only rule is that there are exceptions. Points that continue to be disagreed on by collectors are mentioned throughout the site. Pages are updated as new information is confirmed. If you have questions, new information, disagree with something, or have an interesting example, please reach out through the contact page. I claim no responsibility for purchases based on the information obtained from this website. This is a reference for scholarship and camaraderie rather than for investment.

If you’re interested in other Rolex sports watches, I’ve also created a reference website for the Explorer 1016.


Thanks go to JP (“springer” on Rolex Forums) and Bill on PuristSPro, for their foundational contributions to the dial variants (especially the matte dial system) and continuous help to everyone on all questions GMT-related. Further thanks go to Jacek Kozubek of HQ Milton, Michael Morgan of Iconic Watch Company, and Beaumont Miller II, for their bevy of pictures. And an appreciation to those I have credited throughout the site for their scholarship, to the others who donated additional pictures, and to those who helped during revision.

GMTMaster1675.com is not affiliated with Rolex S.A., Rolex USA, or any of its subsidiaries.

Top Picture Credit: Bexsonn