Seiko Cal. 6690 - 407

The Seiko 6690-407 represents an important milestone in Seiko's 1966 lineup. It features a Green dial protected by a Hardlex crystal and offers 80m of water resistance. [seikata-wm-18fbd66ef775]

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

8.6mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Green

Jewels

27j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1966

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