Omega

• cal. 1002 automatic nickel lever movement, 20 jewels • blue dial, luminescent  baton indexes, large orange minute hand, sweep center seconds, aperture for date at 3 o'clock • oversized asymmetric case with raised resin bezel calibrated for five minute divisions, screw down and locking crown, large red button for releasing bezel to upper right • case, dial and movement signed • with a stainless steel Omega bracelet

The movement is running, however it may require service soon. The dial, as noted in the catalogue, has a very nice blue-gray tone. There is some very slight loss to the orange paint on the hour hand, and fading to the luminescence throughout. The case has very nice definition with very few signs of wear throughout. The overall length of the bracelet is 190mm.
"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."

This model, the Omega Professional Seamaster 600, was originally designed for use by deep-sea divers and became known as the 'PloProf', for 'Plongeur Professionel'.

The present example is particularly interesting as it has a blue-gray dial. Normally PloProf examples have a standard black dial.

Though most watches are made with the crown at 3 o'clock, the standard PloProf has its crown at 9 o'clock so that the red pusher is more accessible and the relatively cumbersome crown guard does not interfere with wrist movement.

When diving, one can calculate how much oxygen remains in the tank and adjust the bezel for accurate timing. By pushing the red button, the locked bezel releases an the bezel can then be adjusted.

A study conducted by Ocean Systems, Inc., a diving research facility, indicated that the PloProf is proportionally more resistant to pressure and water than a submarine.