Seiko Cal. 5638 - 674

The 5638-674 is a sought-after Quartz piece from Seiko's golden era. Powered by the 5638 caliber with 19j jewels beating at 36,000 bph, it delivers a 72 hours power reserve. [seikata-wm-54ff8fd4ea46]

Also known as: Bullhead, Sea Horse

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

46mm

Case Thickness

14.1mm

Lug Width

21mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Champagne

Jewels

19j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1965

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