Seiko Cal. 5637 - 255

This Spring Drive model from 1971 features a 46mm Gold-Plated case. With its 18mm lug width and 8.3mm profile, it sits comfortably on most wrists. [seikata-wm-03a11b1e07d6]

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

46mm

Case Thickness

8.3mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

27j

Frequency

28,800 bph

Power Reserve

44 hours

Year

1971

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