Seiko Cal. 6642 - 764

Seiko 6642-764

The 6642-764 is a sought-after Quartz piece from Seiko's golden era. The Coin-Edge bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-1a08f71354c1]

Also known as: Sumo, Sea Horse

Specifications

Movement
Quartz
Case Material
PVD Black
Case Width
38mm
Case Thickness
15.9mm
Lug Width
22mm
Crystal
Hardlex
Bezel
Coin-Edge
Water Resistance
50m
Dial Color
Green
Jewels
31j
Frequency
28,800 bph
Power Reserve
52 hours
Year
1965

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