Seiko Cal. 6690 - 631

The 6690-631 is a sought-after Quartz piece from Seiko's golden era. The Coin-Edge bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-844e9dd2bbd3]

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

46mm

Case Thickness

10.0mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

White

Jewels

20j

Frequency

21,600 bph

Power Reserve

69 hours

Year

1965

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