In 1968 a Japanese saturation diver complained to Seiko that all the existing diver watches were not strong enough to withstand heavy impact and prolonged periods of deep underwater pressure. After seven years of development Seiko launched the “perfect professional divers' watch” in 1975. One of its innovative features is the ceramic protective shroud that makes the watch extremely robust and also very distinctive. Aficionados of Seiko watches thought it looked like the wearer had a can of tuna strapped to his wrist, hence the nick-name, “Tuna”.
It’s a big watch - though the relatively short lug to lug width means it’s not impractically so - and people either love ‘em or hate ‘em. It’s ironic a watch that looks like a can of tuna should be such a “Marmite” timepiece.
Sapphire Crystal GlassNH35 Automatic Movement120 Click Rotational Ceramic Bezel300m Water ResistanceScrewdown CrownScrewback Case316L Stainless Steel CaseStainless Steel Jubilee Strap fitted and free Rubber Strap also suppliedHacking MovementC3 Luminova on the face
Lug width - 22mmCase Diameter - 47.5mmLug to Lug - 47.5mmCase Thickness - 15mmWeight - 210gHard Presentation Box and warranty card
Overall the SD1975C is a superb watch for the money. It is reliable, hard-wearing and looks fantastic. It is a real chunk of a watch that constantly gets positive comments from owners and admirers and definitely makes the wearer stand out from the crowd. We also supply a free Steeldive branded rubber strap with fitting tool and extra pins so you can give the watch a different look if you want.
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