Dubbed "The World's Most Accurate Wristwatch", you are looking at a very rare piece of History!

Omega, “Constellation, Marine Chronometer, Megaquartz, f2,4 MHz”, No. 37057575, Ref. ST 198.0074 / 398.0836. Sold on December 7, 1976. Very fine, rare, and exceptionally accurate, large, rectangular, dead center seconds, water-resistant (but I cannot guarantee water resistance for a vintage like this), stainless steel gentleman`s wristwatch with date, independent hour adjustment and 14K gold bezel and an integral Omega bracelet with deployant clasp. Comes with ORIGINAL chronometer certificate from the University of Besancon. Rare indeed!

Compare with the one sold at Omegamania on 15 April 2007, No. 37057175 (as opposed to my 37057575), which was sold for CHF 7670! (about USD6,900!!!). I am the second owner of this watch. I am offering this at US$4,000 plus shipping. Original list price in 1976 was US$1850!

Case: Two-body, polished and brushed, 14K gold bezel secured with four screws, back secured by four screws, sapphire crystal. Case has been lightly professionally polished, clasp has a faint engraving of previous first owner's name. Crystal has a 2-cm light scratch across it which can be seen from certain angles.

Dial: Black, white baton indexes, outer minute/seconds divisions on a raised plateau, date aperture. Tangerine “baton” hands with luminous inset, white center seconds hand.

Movement: Cal. 1511, 13 jewels, with quartz standardization. Dim. 32.5 x 48.8 mm. Thickness 12.4 mm.

MORE INFORMATION FROM OMEGA AND ANTIQUORUM WEBSITES:

The Megaquartz 2400 – or f2,4 MHz – is regarded as the world`s most technically advanced wristwatch. It is precise to less than one second per month, which makes it about ten times more accurate than an ordinary quartz watch. This precision stems from a specially-designed tiny disc-shaped resonator, which is sealed in a capsule and vibrates to the amazing rate of 2,359,296 times a second. The title of “world’s most accurate wristwatch” was bestowed on the watch after 63 days of rigorous testing, resulting in a mean variation rate of no more than 2/1000ths of a second per day, or 0.73 seconds per year. Moreover, the watch is equipped with a time zone and seconds adjustment device. This allows for independent hour adjustment, thus not affecting the minutes or seconds. With the seconds corrector in the band the watch can be set to the exact second according to the official time signal. The Megaquartz 2400 was developed in cooperation with the Battelle Institute of Geneva. The first prototype, using caliber 1510, was presented at the 1970 Basel Fair. The watch was launched two years later in its standard version with caliber 1510 and in 1974 as a marine chronometer, with caliber 1511. Caliber 1511 was launched in 1972 and was produced in only 1000 examples. It is so precise that it was awarded the title of “Marine Chronometer” from the Astronomic and Chronometric Observatory of Neuchâtel.