1964 Seiko Mono Pusher Chronograph (Ref. 45899)

The Seiko Mono Pusher Chronograph is a special piece of the brand’s legacy and represents Seiko’s very first chronograph watch. Designed alongside the Seiko World Time, both groundbreaking models were created to celebrate the 1964 Summer Olympics hosted by Japan, and the Seiko Mono Pusher Chronograph ref. 5719/45899 debuted in time for the event as Japan’s first-ever chronograph wristwatch.

Since the Seiko ref. 45899 is a monopusher-style chronograph, the single pusher at the 2 o’clock location is used to start, stop, and reset the chronograph feature. Additionally, since the chronograph itself consists of just a single centrally-mounted seconds hand, the rotating bezel features a 60-minute scale, which can be used to track elapsed minutes. Powered by a manually-wound, column wheel movement, the Seiko Mono Pusher Chronograph represents an important point in the historic Japanese watch manufacturer’s history and it will forever stand out as the brand’s original chronograph.


Stock # SKOMPC45899
Brand Seiko
Style Mono Pusher Chrono
Model 45899
Serial 4NXXXX
Size Men's
Material Stainless Steel
Dial Silver
Millimeters 38
Bracelet Seiko Bracelet


The original 38mm stainless steel case appears to be unpolished and is in excellent overall condition with crisp lines and sharp angles present throughout the lugs. Additionally, the case back still retains its Olympic Torch insignia, which celebrates Seiko’s role as the Official Timekeeper of the Olympic Games that year and has often faded away from surviving examples of the brand’s Mono Pusher Chronograph. Completing the watch is its proper circa-correct Seiko bracelet, which features a multi-link design and a fold-over clasp crafted from stainless steel.


The original anthracite gray sunburst dial features white text and is in wonderful overall condition with only minor signs of age. The dauphine-style hands are in similarly well-preserved condition and offer an inherently Seiko aesthetic and the luminous material on them remains entirely intact, despite having some slight discoloration.


None. Watch is functioning perfectly and keeping time, previous service history is unknown.