cal. G1781 automatic winding movement 34 jewels • matte black dial applied steel Arabic numerals with minute indexes red chronograph seconds hand aperture revealing tourbillon carriage 30-minute and 12-hour registers • oversized black ceramic case sapphire crystal case back secured by 6 screws screw down crown flanked by two large chronograph buttons • case dial and movement signed • with a Graham rubber strap and ceramic folding clasp