A GOLD AND COLOURED DIAMOND 'INSTRUMENTO UNO' GENTLEMAN'S WATCH, BY DE GRISOGONO

A GOLD AND COLOURED DIAMOND 'INSTRUMENTO UNO' GENTLEMAN'S WATCH, BY DE GRISOGONO
The rectangular-shaped black dial comprising two time zones, one with Arabic numerals, and double apertures for date at 7 o'clock, within a black gold surround with black diamond line details, to the black shagreen straps and deployant clasp, automatic movement, mounted in steel, 21.0 cm long, with an additional white shagreen strap
Signed de Grisogono, nos. 346/1300-3 and 002896