Seiko Cal. 6631 - 408

The Seiko 6631-408 represents an important milestone in Seiko's 1987 lineup. It features a Cream dial protected by a Sapphire crystal and offers 160m of water resistance. [seikata-wm-efcf4932e801]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

14.5mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

160m

Dial Color

Cream

Jewels

19j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1987

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