Seiko Cal. 6631 - 950

Seiko 6631-950

The 6631-950 is a sought-after Solar piece from Seiko's golden era. Powered by the 6631 caliber with 20j jewels beating at 36,000 bph, it delivers a 58 hours power reserve. [seikata-wm-855efa9da2a2]

Also known as: Monster, Golden Tuna

Specifications

Movement
Solar
Case Material
Stainless Steel
Case Width
35mm
Case Thickness
12.7mm
Lug Width
18mm
Crystal
Hardlex
Bezel
Fixed
Water Resistance
50m
Dial Color
Champagne
Jewels
20j
Frequency
36,000 bph
Power Reserve
58 hours
Year
1986

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