Seiko Cal. 5638 - 577

The 5638-577 is a sought-after Spring Drive piece from Seiko's golden era. With its 18mm lug width and 11.7mm profile, it sits comfortably on most wrists. [seikata-wm-fc3187db3e6d]

Also known as: World Timer

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

44mm

Case Thickness

11.7mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Champagne

Jewels

23j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1975

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