• cal. 17-250 mechanical movement powered through a photo-electric cell, 28 jewels, the battery recharged by the solar panel • silvered matte dial, engraved baton numerals on raised gilt chapter ring, gilt dauphine hands • cylindrical case with finely hand-engraved geometric pattern, solar panel set into the domed revolving top, on three fluted feet • base engraved le Conseil d'Administration de la Société Anonyme Suisse d'Explosifs CHEDDITE à son Président M. HUGES JEQUIER, 22 Août 1958, case numbered, dial and movement signed

The movement is running at the time of cataloguing, however it might benefit from a service in the near future. Dial in good condition with signs of aging and light scuffs. Case with light scratches. Overall in good condition.
"In response to your inquiry, we are pleased to provide you with a general report of the condition of the property described above. All dimensions in catalogue descriptions are approximate. Condition reports may not specify mechanical replacements or imperfections to the movement, case, dial, pendulum, separate base(s) or dome. Watches in water-resistant cases have been opened to examine movements but no warranties are made that the watches are currently water-resistant. Please note that we do not guarantee the authenticity of any individual component parts, such as wheels, hands, crowns, crystals, screws, bracelets and leather bands, since subsequent repairs and restoration work may have resulted in the replacement of original parts. Since we are not professional conservators or restorers, we urge you to consult with a restorer or conservator of your choice who will be better able to provide a detailed, professional report. Prospective buyers should inspect each lot to satisfy themselves as to condition and must understand that any statement made by Sotheby's is merely a subjective, qualified opinion. Prospective buyers should also refer to any Important Notices regarding this sale, which are printed in the Sale Catalogue. In particular, please note it is the purchaser's responsibility to comply with any applicable import and export matters, particularly in relation to lots incorporating materials from endangered species.NOTWITHSTANDING THIS REPORT OR ANY DISCUSSIONS CONCERNING A LOT, ALL LOTS ARE OFFERED AND SOLD AS IS" IN ACCORDANCE WITH THE CONDITIONS OF BUSINESS PRINTED IN THE SALE CATALOGUE."

**Please be advised that bands made of materials derived from endangered or otherwise protected species (i.e. alligator and crocodile) are not sold with the watches and are for display purposes only. We reserve the right to remove these bands prior to shipping.

Important Notice regarding importation into the United States of Rolex watches
Sotheby's cannot arrange for the delivery of Rolex watches to the United States because U.S. laws restricts the import of Rolex watches. The buyer or a designated agent may collect the property in the country of sale."

With a Patek Philippe fitted box.

In 1954 Patek Philippe patented the Photoelectric Energy invention. A horological mechanism deriving its motive power from a source of light by the means of at least one photoelectric cell. Patek Philippe's idea for a light-powered horological mechanism was to introduce additional electronic storage - an accumulator which provides the energy to wind the spring. The photoelectric cells could either store their energy electronically in the accumulator, or mechanically by winding the spring. When the mechanism was fully wound, the cells switched over to charge the accumulator.