1980 JDM Seiko Tuna Professional 300m 7549-7010

Offered here is a classic early example of the Seiko “Tuna” Professional 300m diver, reference 7549-7010, dating to May 1980. This model is the JDM version with Kanji day-wheel. This model represents one of Seiko’s most iconic tool watches, designed for professional use with its monocoque case construction and protective outer shroud. Serial Number: 050XXX Powered by the robust Seiko 7549 quartz movement, known for its reliability and durability. A new battery was installed in June 2026. The watch has been fitted with a new period-correct rubber strap, maintaining the original tool-watch aesthetic. Condition: This example presents as an honest, well-used vintage diver with strong character and a clean overall appearance. Case & Shroud: Moderate wear throughout, including surface scratches, scuffs, and small dings consistent with use. The case retains its strong shape with no major damage. Bezel: The bezel insert shows heavy patina and speckling, giving the watch a distinctly vintage appearance. All markings remain visible and legible. Crystal: Clean, clear, and free of scratches or wear. Dial & Hands: The dial is in excellent condition with crisp printing. Lume plots are intact and evenly aged. Hands show matching patina, consistent with the watch’s age. Crown: Crown shows light wear and operates as expected. Caseback: Engravings, including the tsunami logo and reference details, remain clearly visible. Surface wear present but appropriate for age. Strap: New period-correct rubber strap installed, unworn.