Seiko Cal. 6631 - 680

Seiko 6631-680

The 6631-680 is a sought-after Quartz piece from Seiko's golden era. Powered by the 6631 caliber with 35j jewels beating at 21,600 bph, it delivers a 67 hours power reserve. [seikata-wm-c86d055bf32d]

Also known as: Turtle, Goldfeather

Specifications

Movement
Quartz
Case Material
Titanium
Case Width
36mm
Case Thickness
13.0mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
90m
Dial Color
White
Jewels
35j
Frequency
21,600 bph
Power Reserve
67 hours
Year
1977

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