Seiko Cal. 6634 - 487

The Seiko 6634-487 represents an important milestone in Seiko's 1981 lineup. It features a Black dial protected by a Sapphire crystal and offers 30m of water resistance. [seikata-wm-320c2938256b]

Also known as: Sea Horse, Arnie

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

36mm

Case Thickness

15.6mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

30m

Dial Color

Black

Jewels

29j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1981

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