Seiko Cal. 5640 - 627

The Seiko 5640-627 represents an important milestone in Seiko's 1982 lineup. The Rotating bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-08c5a2cc608a]

Also known as: Bullhead, UFO

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

13.3mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

80m

Dial Color

Navy

Jewels

32j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1982

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