Great Deals on Authentic Preowned & Used Urwerk Watches! We Buy, Sell, Trade, Repair, & Consign. Urwerk was founded in 1995 by two brothers Felix and Thomas Baumgartner and a friend Martin Frei. The two brothers were talented watchmakers and Martin was a gifted artist and designer. With their combined passion for time they created a watch company that shows their own vision of time.Many people consider preowned Urwerk watches, used Urwerk watches & second hand Urwerk watches all the same, but a Gray & Sons Urwerk watch is something different altogether. All our Urwerk timepieces are serviced and polished to like new condition and come with our twelve month warranty and "Like New for Life" policy. Our after sales service commitment is second to none in the world, backed by our six in house Swiss-trained watchmakers and jewelers.