Seiko Cal. 4578 - 763

The 4578-763 is a sought-after Spring Drive piece from Seiko's golden era. With its 18mm lug width and 15.8mm profile, it sits comfortably on most wrists. [seikata-wm-3aa1d678b52c]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

38mm

Case Thickness

15.8mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

180m

Dial Color

Champagne

Jewels

36j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1989

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