Cvstos is Swiss watch brand founded in 2004 by Sassoun Sirmakes and Antonio Terranova. Sirmakes’s father, Vartan, is the Chairman of the Franck Muller Watch Company. Hence, Cvstos is part of the Franck Muller group. The brand produces watches in a tonneau shape called the Challenge as well as watches in a round shape called the Challenge-R. The Cvstos Challenger watches are very similar to the Franck Muller Cintree Curvex watches due to the relationship between the two brands. GOVBERG JEWELERS IS AN OFFICIAL AUTHORIZED RETAILER OF CVSTOS.