Seiko Cal. 6631 - 230

The Seiko 6631-230 represents an important milestone in Seiko's 1984 lineup. The Coin-Edge bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-b572907fe099]

Also known as: Bellmatic

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

13.3mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

White

Jewels

20j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1984

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