Seiko Cal. 5638 - 856

The 5638-856 is a sought-after Quartz piece from Seiko's golden era. Powered by the 5638 caliber with 33j jewels beating at 36,000 bph, it delivers a 61 hours power reserve. [seikata-wm-76a48bca71d8]

Also known as: Bullhead

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

39mm

Case Thickness

13.9mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Navy

Jewels

33j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1989

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