Seiko Cal. 6640 - 136

Seiko 6640-136

This Quartz model from 1979 features a 45mm Titanium case. Powered by the 6640 caliber with 36j jewels beating at 36,000 bph, it delivers a 38 hours power reserve. [seikata-wm-16882024d743]

Specifications

Movement
Quartz
Case Material
Titanium
Case Width
45mm
Case Thickness
12.0mm
Lug Width
18mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
110m
Dial Color
Navy
Jewels
36j
Frequency
36,000 bph
Power Reserve
38 hours
Year
1979

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seikata-wm-16882024d743