The GRIGRI watches case is made in surgical grade stainless steel 316L: Polished silver color, Diameter 39 mm, Thickness 12mm, top glass sapphire, bottom sapphire glass showing the operation of the automatic movement
Automatic analogue Miyota 821A with date at 6 o'clock. Vibration frequency : 21600 per hour - Jewels 21 pcs Running reserve 42 hours A quartz version with a Miyota 2315 with date at 6 o'clock is also available