A stainless steel diamond-set 'Instrumentino' dual time quartz wristwatch, by De Grisogono

A stainless steel diamond-set 'Instrumentino' dual time quartz wristwatch, by De Grisogono
The black square dial with Arabic numerals, diamond-set hour markers and four luminous hands, within a polished rectangular bezel and diamond-set lugs, case 29mm wide, bracelet inner circumference approximately 16.5 cm, in maker's presentation box, with papers
Dial, case and buckle signed De Grisogono, case signed Instrumentino, no. 014220