Seiko Cal. 5637 - 207

The Seiko 5637-207 represents an important milestone in Seiko's 1999 lineup. With its 20mm lug width and 9.5mm profile, it sits comfortably on most wrists. [seikata-wm-aa90eb3fecf6]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

44mm

Case Thickness

9.5mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

White

Jewels

27j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1999

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