Seiko Cal. 6634 - 587

The Seiko 6634-587 represents an important milestone in Seiko's 1981 lineup. It features a Champagne dial protected by a Sapphire crystal and offers 90m of water resistance. [seikata-wm-c87b2650637e]

Also known as: Sumo, Panda

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

14.1mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Champagne

Jewels

31j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1981

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