Seiko Cal. 6637 - 522

The Seiko 6637-522 represents an important milestone in Seiko's 1981 lineup. It features a Champagne dial protected by a Acrylic crystal and offers 180m of water resistance. [seikata-wm-6bc79ec82f88]

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

44mm

Case Thickness

13.5mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

180m

Dial Color

Champagne

Jewels

19j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1981

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