A RARE AND FINE LIMITED EDITION PLATINUM ONE-MINUTE TOURBILLON PERPETUAL CALENDAR CHRONOGRAPH WRISTWATCH WITH MOON PHASES AND FOUR-DIGIT YEAR INDICATION, International Watch Co., Schauffhausen, "DA VINCI TOURBILLON", NO. 23/50, CIRCA 2000

three-quarter plate gilt lever movement, 35 jewels, one-minute tourbillon with mono-metallic compensation balance, adjusted to 5 positions, blue glossy dial, applied faceted numerals with luminous dots above, four subsidiary guilloche dials indicating date of the month at 3, month with 12 hours register at 6, day with constant seconds at 9 and sector for moon phases combined with 30 minutes register at 12, aperture for four-digit year indication between 7 and 8, outer ring divided in 1/4 second with central chronograph hand in white, luminous baton hands, heavy polished platinum case with stepped bezel and round chronograph push buttons, water-resistant type screwed-down sapphire crystal display back to reveal the one-minute tourbillon carriage inside, case back further engraved "Limited Edition 23/50", case, dial and movement signed, with a platinum IWC buckle.

This rare platinum "Da Vinci Tourbillon" was produced in a very limited series of only 50 examples especially to commemorate the millennium in 2000. The current lot being offered at auction is numbered 23. It is interesting to note that this watch can keep its calendar correct until the year 2499.