Worn by race car drivers, musicians, and astronauts, an original vintage 1970 Seiko 6139-60010 "Cevert" proof/proof automatic chronograph advertisement commemorating Seiko's long and varied history within racing sports.
 
Dimensions: 10.25 inches wide by 13.5 inches high
 
Within the Road Rat automotive magazine Autumn/Winter 2018 debut edition, an article was included on the Seiko 6139 automatic chronograph – the first automatic chronograph in the world – and its connection to Formula One (F1) racing legend, François Cevert, marking the first widely(ish) publicized link between the dark blue-dialed 6139 and Cevert.  Hence the moniker "Cevert," which caught on in collector circles quickly.
 
But during the same era (and for long after Cevert's untimely racing death), Japanese racer Tetsu Ikuzawa - one of the most successful and prolific Japanese drivers from the early years of the nation's automobile racing history - wore one a Seiko 6139 "Cevert" during races. 
 
When Ikuzawa was a mere 15 years old, he began competitive motorcycle racing, switching to autos in 1963 to compete in the inaugural Japanese Grand Prix sports race. 
 
While continuing to compete in races in Japan, he was the first Japanese driver to regularly compete in a number of notable European championships, namely the British F3 Championship and European F2 Championship; he was also one of the first Japanese drivers to compete in the epic 24 Hours of Le Mans endurance race. 
 
Throughout his long career, he frequently drove Porsche cars, beginning in 1964 with a Porsche 904, transitioning repeatedly to eventually drive a 935.  His dedication to the company runs deep, as does his daughter Mia, a designer with Porsche.