Seiko Cal. 5631 - 262

The Seiko 5631-262 represents an important milestone in Seiko's 1965 lineup. With its 21mm lug width and 12.7mm profile, it sits comfortably on most wrists. [seikata-wm-f6fb360e85ea]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

12.7mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Champagne

Jewels

33j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1965

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