Paying tribute to one of the most iconic dive watches ever made, the SteelDive SD1975 “Tuna” delivers legendary tool-watch design with modern specs at an unbeatable value. Inspired by the historic Seiko Tuna, originally developed in the 1970s for saturation divers, this watch is built for extreme durability, reliability, and everyday wear.
The SD1975 captures the unmistakable Tuna Can case design, known for its robust construction and professional dive heritage, while upgrading it with modern materials and a proven automatic movement.
Automatic Seiko NH35 Movement – Reliable, hacking & hand-winding
Scratch-Resistant Sapphire Crystal
300M / 1000ft Water Resistance – True professional dive rating
Solid Stainless Steel Case (Tuna Style)
120-Click Unidirectional Dive Bezel
Milled Stainless Steel Clasp – Secure & durable
Excellent Lume for low-light visibility
Screw-Down Crown & Caseback
✔ FAST SHIPPING FROM THE USA – No long overseas wait
✔ No Customs Fees or Import Delays
✔ Brand New & Carefully Packed
✔ Trusted, Reputable Seller
Avoid the risks of international sellers and get your watch quickly and safely.
Brand New SteelDive SD1975 Tuna Watch
Original SteelDive Box
Tags & Packaging
The original Tuna diver was designed in the 1970s for professional divers who needed a watch that could survive extreme underwater conditions. Its shrouded, cylindrical case became legendary for strength and function. The SteelDive SD1975 honors this legacy while offering modern affordability and specs that rival far more expensive watches.