The case, in 18kt white or rose gold, measures 41mm x 11.8mm. It has double AR-coated sapphire crystals.
Movement is the German manual-wind Grossmann in-house caliber 100.3 with 26 jewels (3 in screwed gold chatons) 18,000 vph and a power reserve of 42 hours. Adjusted to five positions. It features a lever escapement, shock-resistant Grossmann balance with 4 inertia and 2 poising screws, a Nivarox 1 balance spring with No. 80 Breguet terminal curve with Gerstenberger geometry. Functions are: hours and minutes, subsidiary seconds with stop seconds, date display, and Grossmann manual winder with pusher.