Seiko Cal. 4578 - 363

The 4578-363 is a sought-after Spring Drive piece from Seiko's golden era. With its 19mm lug width and 13.5mm profile, it sits comfortably on most wrists. [seikata-wm-65bb9cb7b97f]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

36mm

Case Thickness

13.5mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

90m

Dial Color

Burgundy

Jewels

20j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1991

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