Seiko - King Seiko - Ref. SDKS021 (6R55-00B0) JDM (domestic Japanese boutiques and authorized dealers) - Unisex - 2021

Seiko – King Seiko Automatic "3 Days" Black Dial – Ref. SDKS021 (6R55-00B0) JDM (domestic Japanese boutiques and authorized dealers)

Description:

Up for auction is a magnificent modern King Seiko automatic wrist watch (Ref. SDKS021 / International Ref. SPRE001), featuring a striking deep black sunray dial. Drawing design inspiration from the legendary 1965 King Seiko KSK series, this timepiece showcases sharp, multi-faceted angular lugs, high-grade Zaratsu-style mirror polishing, and the iconic textured double index at 12 o'clock.

Powered by the high-grade Seiko Caliber 6R55 automatic movement, it features an impressive 72-hour (3 Days) power reserve, date display at 3 o'clock, and hand-winding/hacking capabilities. The case back prominently displays the engraved King Seiko shield emblem, while the original stainless steel multi-link bracelet features a signed folding clasp.

This watch comes as a complete set including its original Seiko inner/outer box, King Seiko travel pouch, manual, and extra bracelet links.

While it is standard production, JDM references like the SDKS021 are primarily distributed in domestic Japanese boutiques and authorized dealers, making them slightly rarer on European platforms than their global counterparts (SPB387).

Specifications & Features:

Brand: Seiko

Model: King Seiko Automatic "3 Days"

Reference Number: SDKS021 / SPRE001 (Case Ref. 6R55-00B0)

Movement: Automatic, Caliber 6R55 (24 Jewels, 72-Hour Power Reserve, 21,600 vph)

Dial: Glossy black with applied faceted indices and date window

Case Material: Stainless steel

Case Dimensions: approx. 38.3 mm (excluding crown) x 46 mm (lug-to-lug)

Case Thickness: approx. 11.7 mm / 12 mm

Crystal: Box-shaped Sapphire Crystal

Case Back: Solid screw-down case back with raised King Seiko crest

Water Resistance: 10 Bar (100 meters / 330 feet - factory spec)

Bracelet: Original King Seiko multi-link stainless steel bracelet with signed deployant clasp

Wrist Size: Currently fits up to approx. 17.0 cm wrist (+ spare links included in box)

Weight: approx. 130 g

Accessories: Original Seiko presentation box, King Seiko fabric pouch, manual, extra links

Condition:

Overall Condition: Pre-owned in excellent cosmetic and functional condition.

Case & Bezel: Shows minimal signs of light surface wear/scuffs consistent with careful handling. No deep scratches or dents. Sharp original geometry and finish.

Dial & Hands: Mint condition, spotless.

Crystal: Clean and clear sapphire crystal.

Movement & Function: Tested on a timegrapher, showing healthy operation with a strong rate of approx. +8 s/d, amplitude of 256°, and 0.1ms beat error. All functions (time-setting, quickset date, manual winding) operate smoothly.

Important Notes for Bidders:

Please review all photos carefully as they form an essential part of the condition description.

Standard pre-owned item disclaimer: Minor micro-scratches or faint marks not easily visible in photographs may be present due to handling.

Shipping:
Shipped fully insured with tracking via Express Courier in secure packaging.