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[SOLD]: 1986 SEIKO “PROFESSIONAL Diver’s 1000m”—Golden Tuna

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  • [SOLD]: 1986 SEIKO “PROFESSIONAL Diver’s 1000m”—Golden Tuna

    S23157: SEIKO’s FIRST 1000m Diver

    Everything started with a letter from a professional diver in Hiroshima prefecture of Japan who wrote to SEIKO in the 1970s. He explained that, when conducting saturation diver in a diving capsule, he could not find a watch was robust enough to withstand the stresses and strains experienced at depth greater than 300 m. Taking up this challenge, SEIKO engineers embarked on years of research and development to achieve the world's first titanium case diver's watch in 1978. This historical first saturation diver’s watch with a quartz movement, the SEIKO Professional Diver’s 600m 7549-7000, followed the intent of creating a professional dive watch with quartz accuracy and dependability, and represented the forefront of the late-1970s Japanese manufacture’s diver technology.

    It is this trueness to its origins and singular focus of overcoming the limitations of movement and case that has given the SEIKO Professional Diver’s 600m an enduring value. Among watch enthusiasts, the 600m 7549-7000 is known as the “Golden Tuna”, a moniker that now refers to a proud series consisting of five generations spanning two movement calibres. The Golden Tuna family line holds a deserved place in SEIKO’s Diver heritage for these very valid reasons.

    1978 Professional Diver’s 600m 7549-7000 from JDM catalog

    Despite more than 20 patents granted to this world standard-changing timepiece, SEIKO did not rest on its laurel and in 1986, introduced the original Golden Tuna’s successor. The world's first 1000m diver with a ceramic outer case, the SEIKO Professional Diver’s 1000m (7C46-7009) was an upgrade on the 600m in every technical aspect. Developed specifically for the Professional Quartz Divers, the Cal 7C46 had longer battery life of 5 years, and encased in the signature two-layer case construction for greater security against shock and corrosion. Only now, the titanium case is shrouded by an outer ceramic layer.

    SEIKO released two versions of the Professional Diver’s 1000m (7C46-7009) both made in Japan with identical specifications. The Japanese Domestic Market model is the SSBS018, while the International version is the S23157. The latter is the piece on offer today and hails from the first year of production, 1986.


    MOVEMENT: Seiko Quartz Cal 7C46, 7 Jewels, 32’768 Hz, 5 year battery life
    CASE: Titanium monocoque (diameter: 48 mm excl crown, lug-width: 22 mm), Ceramic shroud, Unidirectional rotating elapse time bezel, Screw-down crown, Helium gas resistant for Saturation diving
    DIAL: Black with Lumibrite indices and hands
    CRYSTAL: Hardlex, flat profile
    STRAPS: Replacement – Genuine calf leather, carbon fibre-effect “rally style” in black (brand new, never worn), fitted with ORIGINAL gold titanium nitride buckle, removed from the original rubber straps
    MANUFACTURED: In Japan, February 1986

    [IMG] lA93Uh4nmE6toOU4f0xdp19fz1_NX_5QSZVAS2KxarkOti3_fV Zii0l6YsCWVrXJ_hkxFR7lnOmzp5_2YIBz2dNiN0U0NGPOfpcQ SaRUJGWhEHHQgOkrGGPkKdrF5MCuZBbOUbnaXy-2wgeVmZ5cF7iE49rnlKhOIKahM8fxkaVz7FohdB2NVtjtUmFis SrISWn2CUR3VGp2FlgbKvY2PfdaZxZYkvUfxdy7i1R_h862du3 Bwg3UgwDJvogFxN3LGuf3EoBCR3V5k3fN-ct2CCjKJt5B2jBlWcvaW7oPpDTDFcr8B4e-smprxJUqLhY5IeaFzP_86SVzWF9LwlabUy

    W94kf0R9cK6f-ne6pm5famyL3pz3Uoy70vjIcEl6RkSmQ-C6u09d_7C3uECCwIzVtT_p5ous7wHvoLDmuDzic0JLg28z8tdg 3ITa2DKoN2pKCZG2mvrU11V0opGO2DuT849Q1IwE7NLRHgyn_-QHUU7LEumtoXa-bdEVXpDrFPed7aYVpMf7I9QIyR_D2HFllUvwEFwp5X5d8duVzc WaA7xchprtl9_zabqS_VeVVSdb=w897-h674-no[/IMG]

    In the mid-1980s, nearly all diver’s watch were purchased by their first owners for only one purpose—to dive—and this is even more case for professional saturation dive watch like the Golden Tunas. Therefore, it is very rare find a 31 years old specimen like the 1000m S2315 presented here in such well-preserved condition. No doubt, this example has benefited from proper care and maintenance its previous owners have treated it to. Overall, the condition rates TKNZ “EXCELLENT” (88%), with signs of wear limited to the bezel and case back.

    Considering the three decades that have passed, the dial and hands are incredibly mint, as is the ceramic shroud, which resists wear much better than those on its predecessor, the Golden Tuna 600m. The Hardlex is in similarly mint condition. The Cal 7C46 functions perfectly as it should, and my watchmaker has recently installed a new battery cell, so should be good until 2022. A pressure test was also conducted at the time, and the watch passed without issues.

    The accompanying photos above form a part of my description—please study them well. Included is a set of generic rubber straps in similar style to the original SEIKO Z22 Flat Vent. They are used, but in near-mint condition. The watch and I are in Auckland, and plenty of references are available here on the forum and on TradeMe, under "dontia".

    The asking price

    includes delivery
    by CourierPost Signature-Required. If you are in Auckland, I can also deliver to you in person. To further inquire, please use the forum's PM facility. Thank you.

    $ 1990
    On the instruments we entrust to pace our lives, to bear witness to our days, and to be the keepers of the most precious thing we have... time.

  • #2
    PM Sent


    • #3
      SOLD! Thank you TKNZ and buyer.
      On the instruments we entrust to pace our lives, to bear witness to our days, and to be the keepers of the most precious thing we have... time.