Seiko Cal. 5671 - 638

The Seiko 5671-638 represents an important milestone in Seiko's 1977 lineup. The Rotating bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-3c1b4cc6253c]

Also known as: Sumo, Pogue

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

13.6mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

200m

Dial Color

Cream

Jewels

32j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1977

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