Introduced in 1969, the Seiko Speedtimer was a major milestone in chronograph innovation, marking a significant decade for the Speedtimer. The 70s were known for fashion, music, and motorsports. Designed under the 'Classic Motorsports' theme, the 'Circuit Race' Speedtimer is inspired by vintage circuit racing. Encased in a black aluminium bezel with gold plating and sapphire crystal glass, this chronograph features a black dial with hour and minute hands resembling the original Speedtimer. With 12 spots of Lumibrite, it's legible in dark conditions. It includes a chronograph second scale and a Tachymeter on the bezel for measuring speed. Powered by a solar V192, it maintains accuracy to +/- 15 seconds per month with a 6-month charge. Prospex combines 'Professional' and 'Specifications,' offering practical, reliable, and durable timepieces for extreme environments.