Konstantin Chaykin ThinKing Final Prototype (2025)

40 mm diameter x 1.65 mm thickness ultra-thin nickel-alloy case, two sapphire crystals (0.35 mm thick) serving as dial windows, weight just 13.3 g without strap, no crown on watch head (time adjusted via PalanKing case). Manual-wind calibre K.23-0 integrated into caseback, 2.5 Hz, 32-hour power reserve, double balance wheel with patented gear clutch (supporting hours and minutes via Joker-style discs). Comes with black alligator strap with elastic inserts and titanium support structure. Original prototype, one-of-a-kind.