Important Modern & Vintage Timepieces
New York, Sep 30, 2015
DE GRISOGONO INSTRUMENTO TONDO De Grisogono, Genève, "Instrumento Tondo," case No. 007911. Made in the 2000's. Fine and unusual, curved, horizontal oval, self- winding, water-resistant, PVD-coated stainless steel wristwatch with 24 hour indication, power reserve and a stainless steel De Grisogono double deployant clasp.
Two-body, polished and brushed, transparent case back with 4 screws, flat bezel, mobile lugs, faceted black diamond-set winding crown, sapphire crystals. Guilloche black with radial and graduated luminous Arabic numerals, inner oval shaped minute track, subsidiary dial for the 24 hour indicator at 12, up and down sector for the power reserve at 6. Luminous steel dauphine hands. Cal. based ETA 2892A2, black finish, 21 jewels, straight-line lever escapement, monometallic balance, shock absorber, self compensating flat balance spring, micrometer regulator, hack mechanism.