Why This Watch Matters We love this Navitimer for its attractive twin-jet logo and the sharp condition of its case. The Full Story In the early 1950s, Breitling collaborated with the AOPA (Aircraft Owners and Pilots Association) in order to make the slide rule of its Chronomat even more relevant to pilots. The end result, the Navitimer, was a well-conceived tool watch with outstanding legibility. The very first examples came with an all-black dial, but eventually the sub-registers became white to increase the contrast and make it even more legible. Similarly, the AOPA logo was replaced with the twin-jet logo, and the beaded bezel also evolved. Despite these minute cosmetic changes, the Navitimer remained pretty much identical through the years, proving how well executed its first draft was. The Fine Print Maker: BreitlingModel: NavitimerReference: 806Year: 1966Case No: 1066682Material: Stainless steelDimensions: 40mm diameter; 13mm thicknessCrystal: PlexiglassLume: TritiumCaliber: Manual-winding chronograph caliber Venus 178 Bracelet/Strap: HODINKEE Aged Hunter Green Leather StrapLug Width: 22mmBox/Papers: No What we Love and What You Should Know The case is in excellent condition; its lugs still show their original bevels, and the brushed finish is still visible on the case bands. The reverse panda dial is also well preserved, with very clean sub-registers and a legible rotating slide rule. The lume has aged in a very consistent manner, and has taken a dark tint on the applied indexes and handset. The crown is signed with the engraved B as you should expect, and the plexi shows a couple of superficial scratches.