The first model of Datsun 240Z was made in 1969, the same year the Speedtimer was created.

In 1971, adorned with the Seiko logo, the Datsun 240Z with No.11 on its side conquered harsh terrain as it raced 6,200 kilometers to victory in the East-African Safari Rally,
widely regarded as one of the toughest races in the world.

In 1969, Seiko introduced the Speedtimer, the world’s first automatic chronograph equipped with both a vertical clutch and a column wheel, two features that greatly enhanced the measurement of elapsed time.
 
Solar Chronograph Datsun 240Z Limited Edition
Limited edition of 4,000 pieces
 
 
Movement Caliber Number: V192
Movement Type: Solar
Precision: ±15 seconds per month
Power reserve: Operating for approx. 6 months (when fully charged)
Functions
Overcharge prevention function
24-hour hand
Equipped with small seconds hand
Chronograph up to 60 minutes in 1/5 second increments
Power reserve indicator
Date display
 
Case Size
Thickness:13.0mm
Diameter:41.4mm
Lug-to-lug:45.9mm
Crystal: Curved sapphire crystal
Crystal Coating: Anti-reflective coating on inner surface
LumiBrite: Lumibrite on hands and index(es)