Seiko Cal. 6691 - 990

The Seiko 6691-990 represents an important milestone in Seiko's 1965 lineup. It features a Black dial protected by a Acrylic crystal and offers 160m of water resistance. [seikata-wm-07779e1aca2f]

Also known as: Samurai, World Timer

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

34mm

Case Thickness

11.7mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Black

Jewels

22j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1965

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