Seiko Cal. 6637 - 125

Seiko 6637-125

The Seiko 6637-125 represents an important milestone in Seiko's 1972 lineup. Powered by the 6637 caliber with 22j jewels beating at 21,600 bph, it delivers a 42 hours power reserve. [seikata-wm-accee58ce6e8]

Also known as: Shogun, Golden Tuna

Specifications

Movement
Solar
Case Material
Hardlex-Coated Steel
Case Width
40mm
Case Thickness
12.5mm
Lug Width
20mm
Crystal
Mineral
Bezel
Inner Rotating
Water Resistance
60m
Dial Color
Cream
Jewels
22j
Frequency
21,600 bph
Power Reserve
42 hours
Year
1972

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