Seiko Cal. 5631 - 161

The Seiko 5631-161 represents an important milestone in Seiko's 1983 lineup. It features a Black dial protected by a Mineral crystal and offers 140m of water resistance. [seikata-wm-95cec5c34f23]

Also known as: Sea Horse, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

44mm

Case Thickness

12.0mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

140m

Dial Color

Black

Jewels

34j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1983

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