Patek Philippe 5100 (Pre-owned - Excellent) — USD 29,999 on eBay

The Patek Philippe Calatrava reference 5100 was introduced in 2000 as a limited edition to commemorate the new millennium. This reference stands out within the Calatrava line for its distinctive 'Manta Ray' shaped case, departing from the more traditional round Calatrava forms. It was produced in very limited quantities across different precious metals, making it a notable special edition for collectors of the brand. The 5100 features a manual-wind caliber 28-20/220, a movement specifically developed for this model, known for its elongated form to fit the unique case shape. The case is characterized by its rectangular, slightly curved profile with integrated lugs, and it is fitted with a sapphire crystal. The specific variant mentioned, the 5100P-001, is crafted in platinum. This reference appeals to collectors who appreciate Patek Philippe's limited-production commemorative pieces and those drawn to watches with distinctive case designs. Its unique aesthetic and the bespoke movement developed for it position the 5100 as a significant, albeit unconventional, entry in the brand's modern history, particularly for enthusiasts of shaped timepieces.