• automatic nickel lever movement, 25 jewels, mono-metallic compensation balance • silvered dial, applied faceted baton indexes, luminescent dot accents, luminescent hands, sweep center seconds, magnified date aperture in black and red • 18k yellow gold tonneau cast, fluted bezel, screw-down crown, screw-down case back • case, dial and movement signed • with an 18k yellow gold Rolex Jubilee bracelet 

The movement is running, however it might need to be adjusted as it makes a sound when wound. The dial is very nice and in lovely condition with a nice two-tone finish. The case shows general wear with surface scuffs throughout. The outside of the case back is stamped with a head of Helvetica, a case maker's key and '.750 18k' in a box, which is an unusual feature. The numbers between the lugs are have nearly been polished out. The serial number appears to read 22311 and the reference number, 6305, is barely legible. The inside of the case back is clearly stamped 6305. Overall the watch is very nice.
"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."

The present model, Ref. 6503, is known as the 'ovettone',  Italian f꧑or 'l♈arge egg'.  It is one of the first models designated as a Datejust and also one of the last to be considered a 'bubble back'.

When Rolex released these 'ovettone' models in the 1940s, they represented🐓 the highest level of watc𒆙hmaking for the firm. The automatic movement was rated as a certified chronometer and the dial was very refined with its black and red date and elegant finishing. They were almost always sold on Jubilee bracelets, such as the present example.