Chronoswiss Open Gear Tourbillon features a half-skeletonized regulator set-up, electric blue case and a hypnotising handmade guilloché. The tourbillon may have roots stretching back to the end of the 18th century, but the Open Gear Tourbillon, released today on October 30, is a truly modern mechanical timepiece. #chronoswiss #ChronoswissPartner #modernmechanical #tourbillon #regulator #opengear #watch #design #maikpanziera #lucerne #guilloche #watch