Seiko Cal. 5631 - 224

Released in 1981, the Cal. 5631 with design code 224 was part of Seiko's domestic market collection. With its 19mm lug width and 15.7mm profile, it sits comfortably on most wrists. [seikata-wm-34d83fa2ea59]

Also known as: Silverwave, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

15.7mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Silver

Jewels

32j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1981

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