Seiko Cal. 6631 - 448

The Seiko 6631-448 represents an important milestone in Seiko's 1998 lineup. The Bidirectional bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-e9e14186f60b]

Also known as: Samurai, Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

44mm

Case Thickness

9.9mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

21j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1998

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