This magnificent timepiece is where the Seiko chronograph story begins—a true collector’s artifact tied directly to Japan’s bold entrance onto the global stage during the 1964 Tokyo Olympics! This Seiko Crown Chronograph, reference 5717-8990, was the first-ever chronograph wristwatch produced by Seiko, and its movement is a masterclass in elegant, purpose-driven design developed by the Daini Seikosha division to celebrate Seiko becoming the official timekeeper of the Games.
The selling point that distinguishes this from 99% of other chronographs is the pusher configuration: it is a Mono-Pusher Chronograph! The single button at 2 o’clock executes all three functions: Start, Stop, and Reset. This simplified operation hints at the sophisticated movement beneath: the Caliber 5717A is a column-wheel chronograph. A column wheel is the same high-end vertical architecture used by Patek Philippe and Vacheron Constantin; it delivers the smoothest, crispest button feel imaginable and is the mark of a truly high-quality, mechanically pure chronograph.
Notice the clever engineering detail: instead of a tiny, cluttered sub-dial, this watch utilizes a clean, bi-directional rotating bezel to record elapsed minutes, keeping the gorgeous silver sunburst dial clean and readable—a genius tool-watch solution. The watch proudly features 21 Diashock jewels, guaranteeing longevity and resilience. This mono-pusher Crown Chronograph is a cornerstone timepiece that allows the owner to wear the exact moment Japan established itself as a world-class watchmaking powerhouse. It is history, engineering, and elegance—all in one.
