Reference library

The watches that inspire

The history, heritage, and famous wearers behind the world's most iconic timepieces — and how they connect to what you can build today.

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Rolex

1955 – present

Rolex GMT-Master II 'Pepsi'

The GMT-Master was originally developed in 1955 as a tool watch for Pan American World Airways pilots who needed to track multiple time zones simultaneously. Its signature feature — a rotating 24-hour...

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Seiko

1996 – 2021

Seiko SKX007

The Seiko SKX007 is arguably the most important watch in the modding community. Produced from 1996 to 2021, it established itself as the definitive affordable automatic diver — reliable, handsome, and...

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