Seiko Prospex Speedtimer 8R Crono Autom 1972

SRQ045J1 Seiko Prospex Speedtimer 8R Chrono Automatic Watch
Gauge 8R46
Automatic Chronograph, with calendar.
This Speedtimer chronograph is inspired by Seiko's first chronometer designed for timing winter sports.
As the official timekeeping device at a major sporting event held in Sapporo in 1972, the original stopwatch's characteristics were adapted to winter conditions.
These included a black dial for high readability during competitions held in the snow.
Red indices and chronograph subdial at 9 o'clock enhance visibility against the matte black dial, which reduces reflection from sunlight and snow.
For the same reason the stainless steel case is hard coated in black.
It is a limited edition of 600 units.