Seiko Cal. 5644 - 390

The Seiko 5644-390 represents an important milestone in Seiko's 1983 lineup. With its 21mm lug width and 9.9mm profile, it sits comfortably on most wrists. [seikata-wm-b2071ae571a1]

Also known as: UFO, Bellmatic

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

9.9mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Champagne

Jewels

24j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1983

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