Grönefeld G-03

The G-03 is a manual-winding flying tourbillon movement developed and manufactured by Grönefeld. It comprises 278 parts with 27 jewels set in gold chatons and operates at 21,600 vph with a 72-hour power reserve. The movement features a free-sprung variable-inertia balance measuring 10mm and a direct gear train designed to eliminate friction on the mainspring. Currently in production, it powers the Parallax Tourbillon and 1912 models.