Seiko Cal. 6637 - 487

The Seiko 6637-487 represents an important milestone in Seiko's 1966 lineup. It features a Blue Sunburst dial protected by a Hardlex crystal and offers 30m of water resistance. [seikata-wm-cb3b0a6b16ae]

Also known as: Shogun

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

12.9mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

26j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1966

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