Cartier Santos (New with box and papers) — USD 6,413 on eBay

The Cartier Santos 100 was introduced in 2004 to commemorate the 100th anniversary of the original Santos-Dumont watch. It represents a contemporary interpretation of the historic pilot's watch, featuring a larger and more robust case design compared to its predecessors. This model positioned itself as a sportier, more modern offering within the Santos collection, appealing to collectors seeking a bolder presence on the wrist while retaining the iconic square aesthetic. The Santos 100 typically features a stainless steel or precious metal case, often with a brushed finish and polished bezel screws. Case dimensions vary, but common sizes include a large model around 51mm x 41mm. It is powered by an automatic mechanical movement, often a modified ETA caliber, providing reliable timekeeping. The crystal is usually sapphire, and water resistance is generally rated for daily wear. For collectors, the Santos 100 is notable for its blend of heritage design with modern proportions and construction. It marked a significant update to the Santos line, moving towards a more substantial and contemporary aesthetic. Its robust build and versatile design made it a popular choice, bridging the gap between Cartier's dressier offerings and more overtly sporty watches.