Seiko Cal. 6690 - 431

The Seiko 6690-431 represents an important milestone in Seiko's 1972 lineup. It features a Black dial protected by a Sapphire crystal and offers 190m of water resistance. [seikata-wm-05534d960e4c]

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

34mm

Case Thickness

10.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Black

Jewels

31j

Frequency

21,600 bph

Power Reserve

54 hours

Year

1972

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