King Seiko - First Generation - J4145

King Seiko - First Generation - J4145

Cal. 25J - Manual Mechanical - 14K Gold Filled - 1960s Japan JDM

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Description:

The First Generation King Seiko. Manufactured in the early 1960s at the Suwa Seikosha factory, this piece represents Seiko's initial, high-stakes move to challenge the dominance of Swiss luxury chronometers. What truly defines this elite collectible is the internal competition it represents; it was designed to prove that Suwa could produce a watch every bit as "King" as the offerings from their Daini Seikosha rivals.

The architecture is quintessentially mid-century luxury, utilizing a 14K Gold Filled case that provides a deep, warm luster far superior to standard plating. The sunburst champagne dial features the iconic "mountain" style hands and broad, multi-faceted indices that catch the light with every wrist movement. Flipping the watch over reveals the legendary Gold Shield Medallion deeply embossed on the caseback, a definitive mark of its Japanese Domestic Market (JDM) heritage and its status as a top-tier instrument for professionals.

Feature Specification
Brand King Seiko
Model First Generation Diashock
REFERENCE J4145
YEAR Circa 1961–1963 Japan JDM
MATERIAL 14K Gold Filled
WINDING 25-Jewel Manual Mechanical
CALIBER KS 25 Jewels
MEDALLION Original Gold Shield Intact
SKU H1198
CASE SIZE Approx. 35mm
LUG WIDTH 18mm
BRACELET SIZE Approx. 19.5cm (7.7 inches)
SERVICE Movement Inspected & Winding Smooth
STRAP Leather
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