Some watches are purchased by customers as a commemoration in celebration for a life milestone. Others are commissioned by the very Maison themselves to celebrate. In 1955, Vacheron & Constantin was busy celebrating there already 200 years of operation. The fatted calf? The reference 6099. Unveiled to the world, it was the first watch to come completely equipped with the brand new ultrathin caliber 1003 - a movement still in production today. In fact, the summit of watchmaking has been using the caliber for so long that it has been affordable the opportunity to reinterpret its original creations. In 2010, Vacheron & Constantin launched the Historiques Ultra-fine 1955. At just 4.10mm it was at the time the worlds thinnest watch. Its true, other manually wound calibers are thinner but none so reliable The case manufacturer for the 6099 was Eggly & Cie who were produced cases from the mid thirties to approximately the end of the 20th century. They manufactured high-end cases for the likes of Patek Phillipe, Vacheron & Constantin and Audemars Piguet. They specialized in eccentric styles and designs included the Calatrava 2407 dubbed "Sea Turtle." They were also noted for going on to produce Vacherons famed corne de vaches. ABOUT THIS WATCH: MANUFACTURER: Vacheron & Constantin REFERENCE: 6099 YEAR: 1956 CASE: The 32mm solid 18kt pink gold case is in good shape. The case has been previously polished in the past. The case back still illustrates the original brushed finishing. The hallmarks both inside and outside of the case are present and accounted for. The case and case back are serialized and matching confirming they were originally assembled and paired at Vacheron. DIAL: An original pink enamel dial complete with raised enamel "Vacheron & Constantin Geneve" Signature. The raised signature is completely intact and pronounced. The dial exhibits no signs of cleaning. There is one very faint, small dot near the 6 o'clock hour marker than can be seen during certain lighting and viewing angles. MOVEMENT: Vacheron ultra thin manually wound caliber 1003. The caliber is a Jaeger Lecoultre ebauche that has remained in continuous production since its original release in 1955. The movement recently returned from service and will be warrantied for one year dating from completion of service.