Seiko Cal. 5637 - 161

The Seiko 5637-161 represents an important milestone in Seiko's 1990 lineup. With its 20mm lug width and 8.8mm profile, it sits comfortably on most wrists. [seikata-wm-11a8ad285da0]

Also known as: Bellmatic

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

46mm

Case Thickness

8.8mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

200m

Dial Color

Cream

Jewels

30j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1990

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