MeisterSinger Watch Circularis Power Reserve CCP303. MeisterSinger builds mechanical single hand wristwatches that meet the utmost standards in terms of both technology and design. Its premium line Circularis models are powered by movements exclusively developed by specialists and exactly tailored to meet MeisterSinger requirements. The sophisticated mechanics ensure that the single hour hand typical for MeisterSinger runs with outstanding precision. Manfred Brassler, the founder of MeisterSinger, has given these calibers a unique design and the movement has already won several design awards. One of the many qualities of this movement and its automatic counterpart, the MSA01, is the fact that its twin mainspring barrels provide a power reserve of 120 hours when fully wound: 120 hours in which the watch runs with high precision without having to wind it or move the rotor.