Seiko Cal. 5631 - 744

The 5631-744 is a sought-after Automatic piece from Seiko's golden era. The Inner Rotating bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-228fff49ff2a]

Also known as: Golden Tuna

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

10.4mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Blue Sunburst

Jewels

35j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1974

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