This is a very fine manual winding ref. 6498 circa 1964 Vacheron Constantin Geneve 18k solid-gold ‘extra-flat’ watch. This is still one of the thinnest mechanical wrist watches available. Measuring only 1.64mm thin, this movement still holds the record. The development of this movement was a joint-effort between Vacheron Constantin, Jaeger-LeCoultre, and Audemars Piguet. The 1003 is still used in Vacheron Constantin’s current range today. Vacheron re-launched this movement in 2010, celebrating its 55th anniversary and called the watch the “Historique Ultra-Fine Watch.” This caliber 1003 manual winding, rhodium-plated Vacheron movement is adjusted to five position, was just cleaned, and is accurate. We have never seen another ref. 6498 Vacheron – this is the first we’ve seen! The 18k solid-gold case is in very fine condition overall. Notice the very rare cross-hatch-patterned bezel with graduated indices at the number positions.