Seiko Cal. 6640 - 217

Seiko 6640-217

This Quartz model from 1976 features a 45mm Two-Tone case. Powered by the 6640 caliber with 35j jewels beating at 21,600 bph, it delivers a 69 hours power reserve. [seikata-wm-50c9167eac34]

Specifications

Movement
Quartz
Case Material
Two-Tone
Case Width
45mm
Case Thickness
14.6mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
110m
Dial Color
Navy
Jewels
35j
Frequency
21,600 bph
Power Reserve
69 hours
Year
1976

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seikata-wm-50c9167eac34