Seiko Cal. 5644 - 540

The Seiko 5644-540 represents an important milestone in Seiko's 1980 lineup. The Fixed bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-33d4083463e7]

Also known as: UFO, Goldfeather

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

9.1mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

180m

Dial Color

Cream

Jewels

18j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1980

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