Seiko Cal. 5637 - 448

The Seiko 5637-448 represents an important milestone in Seiko's 1970 lineup. With its 18mm lug width and 15.1mm profile, it sits comfortably on most wrists. [seikata-wm-3b9589d40204]

Also known as: UFO

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

15.1mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

40m

Dial Color

Green

Jewels

18j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1970

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