1975s Seiko "Grandfather Tuna" ref.6159-7010 with its original rubber strap

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The 1975 Seiko "Grandfather Tuna" ref. 6159-7010 is a legendary dive watch renowned for its robust construction and pioneering design. Featuring its original rubber strap, this model exemplifies Seiko’s commitment to durability and functionality under extreme conditions. Powered by the high-beat 6159 automatic movement, it offers precision and reliability, making it a prized piece for collectors and enthusiasts of vintage professional dive watches.