Seiko Cal. 6640 - 283

Seiko 6640-283

The 6640-283 is a sought-after Quartz piece from Seiko's golden era. The Coin-Edge bezel and 35mm case give it a distinctive presence on the wrist. [seikata-wm-c4bbf98e6d19]

Also known as: Sea Horse, Flighty

Specifications

Movement
Quartz
Case Material
Hardlex-Coated Steel
Case Width
35mm
Case Thickness
8.7mm
Lug Width
18mm
Crystal
Hardlex
Bezel
Coin-Edge
Water Resistance
180m
Dial Color
White
Jewels
25j
Frequency
21,600 bph
Power Reserve
72 hours
Year
1993

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