GMT done right

I work in weather, so tracking UTC is essential. The best way is with the 24-hour hand set to local time and the bezel set to UTC (trivia: this is how the original GMT Master was designed to work). Add a 24-hour chapter ring and one to easily convert any time (past, present, or future) between local and UTC.

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What brand is that and why does it have SD on the dial?!?

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WhiskeyandWatches

What brand is that and why does it have SD on the dial?!?

It is an SKX build I did with DIY Watch Club parts and a custom dial. The 𝒇(𝒕) logo above my name is something science and math nerds will recognize as notation for “function of time.” The watch was assembled in South Dakota.