Seiko Cal. 5638 - 856

Seiko 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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