Omega 2598.80.00 (Pre-owned - Good) — USD 3,559 on eBay

The Omega Seamaster Planet Ocean Chronograph reference 2598.80.00 stands as an early and formidable example of Omega's commitment to professional-grade dive instruments within its esteemed Seamaster collection. Introduced in the 2005-2010 timeframe, this particular reference was part of the inaugural generation of Planet Ocean models, which sought to establish a distinct line of serious saturation diving watches separate from the more widely recognized Seamaster Professional 300m series. It immediately distinguished itself with its robust construction and impressive water resistance, signaling a new era for Omega's dive watch offerings. The design of the 2598.80.00 emphasizes its tool-watch credentials. Encased in a substantial 45 mm stainless steel chassis, the watch possesses a commanding presence on the wrist, a characteristic that defined the original Planet Ocean aesthetic. A vibrant blue dial provides excellent legibility against the applied indices and broad hands, while the chronograph sub-dials are thoughtfully integrated. Its professional capabilities are underscored by an exceptional water resistance rating of 600 meters, complete with a helium escape valve, making it suitable for demanding underwater environments. Powering this robust chronograph is Omega's automatic Caliber 3301. This movement, a column-wheel chronograph, represented a significant choice for Omega at the time, offering a high-performance and reliable engine for its flagship dive chronograph. The Caliber 3301 is COSC-certified, ensuring precision and accuracy, a critical attribute for any professional timing instrument. Its inclusion highlights Omega's pursuit of advanced horological solutions even before the widespread integration of its proprietary Co-Axial escapement into its chronograph movements. As a foundational piece in the Planet Ocean lineage, the reference 2598.80.00 holds considerable significance for collectors. It embodies the original vision for Omega