Seiko Cal. 6631 - 633

Seiko 6631-633

The 6631-633 is a sought-after Quartz piece from Seiko's golden era. The Rotating bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-338546c2da4c]

Also known as: Baby Tuna

Specifications

Movement
Quartz
Case Material
PVD Black
Case Width
42mm
Case Thickness
8.1mm
Lug Width
22mm
Crystal
Hardlex
Bezel
Rotating
Water Resistance
200m
Dial Color
Black
Jewels
28j
Frequency
36,000 bph
Power Reserve
45 hours
Year
1996

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