Seiko Cal. 6637 - 374

The Seiko 6637-374 represents an important milestone in Seiko's 1974 lineup. With its 18mm lug width and 8.7mm profile, it sits comfortably on most wrists. [seikata-wm-e3ea4a75dd3f]

Also known as: Panda, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

35mm

Case Thickness

8.7mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

40m

Dial Color

Green

Jewels

33j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1974

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