Hamilton Khaki Aviation Converter Auto ChronovsLorier Olympia SII

The Hamilton Khaki Aviation Converter Auto Chrono is widely described as a large 44mm pilot's watch with a functional slide rule bezel. Reviewers note its well-finished steel case, featuring a robust satin-brushed finish with polished accents and chamfers, and a legible blue sunray dial with applied Super-LumiNova markers and old-fashioned hands. It is powered by the H-21-Si automatic chronograph movement, an upgraded ETA-based caliber with a silicon balance spring for anti-magnetic properties, offering a 60-hour power reserve. The watch is rated to 100m water resistance and features a bi-directional slide rule bezel with graduations printed under K1 mineral glass for scratch protection, which is easy to manipulate due to its deeply notched steel design. Some find the slide rule bezel complicated to use without a manual. One owner notes its character does not appeal as much as other slide bezel chronos.

Owners widely praise the Lorier Olympia SII for its excellent value and vintage aesthetic, highlighting the robust Seiko NE88 movement and crisp chronograph pushers. The 39mm case is noted for wearing well, with its layered design effectively managing the 13.8mm thickness. Some owners prefer the hesalite crystal for its aesthetic, while others would like a sapphire option. The bracelet is described as functional but can be a hair nipper. Overall, owners rate the Lorier Olympia SII highly for its execution of a vintage chronograph at an accessible price point.