Seiko Cal. 5631 - 164

Released in 1986, the Cal. 5631 with design code 164 was part of Seiko's domestic market collection. With its 19mm lug width and 10.2mm profile, it sits comfortably on most wrists. [seikata-wm-4fd0723266bd]

Also known as: Crown, Flighty

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

38mm

Case Thickness

10.2mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

White

Jewels

35j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1986

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