Cvstos might not ring a bell with many of our readers but it is a niche watch brand founded in 2005 by Sassoun Sirmakes, son of Vartan Sirmakes of the Franck Muller Watchland Group. Based in Geneva with workshops in Meyrin, Cvstos is renowned for its upmarket watch portfolio built almost entirely around tonneau-shaped cases,Blog – Monochrome Watches