Seiko Cal. 6637 - 401

The Seiko 6637-401 represents an important milestone in Seiko's 1969 lineup. It features a Cream dial protected by a Acrylic crystal and offers 140m of water resistance. [seikata-wm-9336a9977d17]

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

41mm

Case Thickness

9.8mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Cream

Jewels

27j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1969

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