Breitling 806 (Pre-owned - Excellent) — USD 5,000 on eBay

The Navitimer reference 806 is a notable early iteration of Breitling's slide rule chronograph, distinguished by its comprehensive circular slide rule bezel. This reference established many of the visual and functional characteristics that would define the Navitimer line for decades. It represents a foundational piece in the development of the brand's instrument watches, designed for calculations relevant to navigation. The watch features a 40 mm stainless steel case, housing a manual-wind Venus 178 column-wheel chronograph caliber. This movement provides a power reserve of approximately 45 hours. The dial is black, protected by an acrylic crystal, and the watch offers a water resistance of 30 meters. The bi-directional rotating bezel is integral to the slide rule function. For collectors, the reference 806 is significant as an early example of the Navitimer, appealing to those interested in the historical progression of aviation-related timepieces. Its production span saw variations in dial printing and sub-dial configurations, which are points of interest for specialized collectors. The model's enduring design has influenced subsequent generations of the Navitimer.