The genesis of Seiko's diver's watches dates back to the 1960s, a period when the brand embarked on creating timepieces capable of withstanding the rigors of deep waters to rival Swiss watchmaking counterparts.

In 1967, Seiko unveiled the reference 6215-7000, boasting a water resistance of up to 300 meters. This model introduced a monobloc case and a screw-down crown for enhanced protection. Positioned at 4 o'clock, the winding crown lent a distinctive character to the timepiece. Notable upgrades included thicker hands with increased luminous material content compared to earlier iterations. The technical intricacies of the reference 6215-7000 resulted in a brief production span of approximately two years, rendering this watch exceptionally rare in the market. Esteemed for its collectability, this offering presents a unique chance for watch aficionados to acquire a piece of Japanese horological mastery.