UR-101 (and the similar UR-201) are the original models from Urwerk, launched in 1997.

The new Geneva-based company, Urwerk, launched the company's initial product line in 1997 at the World Watches, Clocks and Jewelry Fair in Basel. They presented two similar models UR-101 was presented in yellow gold and UR-102 in stainless steel. Both watches have a similar wandering hours display of time Jumping hours are displayed through an aperture in a disc that travels a 120º arc to indicate the quarters and half-hours. Both watches also feature novel plain cases with unmarked centers. This would form the basis for future “Ur-Satellite” models from Urwerk and would become the company's signature complication.

Unlike following models, UR-101 and UR-102 featured an automatic movement operating at a frequency of 28,800 A/h. Power reserve was 44 hours.

The UR-101 and UR-102 were replaced by the UR-103, introduced in 2003.

• UR-101 features an asymmetrical case said to be reminiscent of the Millenium Falcon of Star Wars fame. The top lugs are hidden under the case, while the bottom features two conventional lugs. The case measures 38 mm in diameter and is 13 mm high.
• UR-102 has a circular case with four lug horns top and bottom. Urwerk claimed inspiration from the Sputnik space probe. The case is also 38 mm in diameter but is 12 mm thick.
• UR-102 “Night Watch” was introduced in 1999 and is similar to UR-102 but with a ceramicized anodized aluminum case in black. The case back is platinum and the hour numerals are luminous.