Seiko Cal. 6640 - 426

Seiko 6640-426

This Kinetic model from 1977 features a 35mm Titanium case. Powered by the 6640 caliber with 34j jewels beating at 36,000 bph, it delivers a 38 hours power reserve. [seikata-wm-575020c5465e]

Also known as: Monster, Baby Tuna

Specifications

Movement
Kinetic
Case Material
Titanium
Case Width
35mm
Case Thickness
10.0mm
Lug Width
19mm
Crystal
Acrylic
Bezel
Coin-Edge
Water Resistance
200m
Dial Color
White
Jewels
34j
Frequency
36,000 bph
Power Reserve
38 hours
Year
1977

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seikata-wm-575020c5465e