Seiko Cal. 6637 - 573

The Seiko 6637-573 represents an important milestone in Seiko's 1975 lineup. With its 21mm lug width and 8.3mm profile, it sits comfortably on most wrists. [seikata-wm-e025a88ebff7]

Also known as: Panda

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

39mm

Case Thickness

8.3mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Blue Sunburst

Jewels

20j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1975

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