Seiko Cal. 4530 - 637

The Seiko 4530-637 represents an important milestone in Seiko's 1970 lineup. With its 20mm lug width and 9.8mm profile, it sits comfortably on most wrists. [seikata-wm-02eff7077c05]

Also known as: Golden Tuna

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

45mm

Case Thickness

9.8mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

30m

Dial Color

Green

Jewels

28j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1970

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