Seiko Cal. 5631 - 321

Released in 1989, the Cal. 5631 with design code 321 was part of Seiko's domestic market collection. It features a Black dial protected by a Sapphire crystal and offers 60m of water resistance. [seikata-wm-bcc9ae98621e]

Also known as: Sea Horse

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

35mm

Case Thickness

11.9mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

60m

Dial Color

Black

Jewels

32j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1989

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