Seiko Cal. 5631 - 668

Seiko 5631-668

The Seiko 5631-668 represents an important milestone in Seiko's 1991 lineup. The Fixed bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-3ad9a86c5ea3]

Also known as: Samurai, Baby Tuna

Specifications

Movement
Hand-Winding
Case Material
PVD Black
Case Width
45mm
Case Thickness
9.2mm
Lug Width
20mm
Crystal
Hardlex
Bezel
Fixed
Water Resistance
60m
Dial Color
Blue Sunburst
Jewels
20j
Frequency
36,000 bph
Power Reserve
68 hours
Year
1991

Related Models

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