Biretrograde" Harry Winston

"Biretrograde" Harry Winston, "Biretrograde", No. 043. Made circa 2000. Very fine, self-winding, water-resistant, 18K white gold gentleman's wristwatch with date, retrograde seconds and day of the week and an 18K white gold Harry Winston deployant clasp. Accompanied by a fitted box and certificate. Two-body, solid, polished, lobed central and mobile lugs, transparent case back, sapphire crystals. Satiné blue, offset petrol-blue chapter ring with radial white Arabic numerals, retrograde sectors for the days of the week at 3 and for the 30-seconds at 9, "cyclops" aperture for the date. White gold "bâton" hands. Cal. 3106.BI, rhodium-plated, "fausses côtes" and "oeil-de-perdrix" decoration, 33 jewels, straight line lever escapement, monometallic balance, shock-absorber, self-compensating flat balance spring, micrometer regulator. The button at 2 is to adjust the days of the week. Dial, case and movement signed. Diam. 35 mm. Thickness 10 mm.