cal. 12100 automatic engraved nickel lever movement stamped with the seal of Geneva 24 jewels one-minute revolving tourbillon • carbon fiber dial white painted Roman numerals luminous Epée hands subsidiary seconds over the tourbillon aperture fan-form sector for power reserve inner minute track outer graduation for the date • 18k white gold polished case concave band crystal case back secured by 6 screws • case dial and movement signed • with an 18k white gold Gérald Genta buckle