Seiko Cal. 6691 - 640

The Seiko 6691-640 represents an important milestone in Seiko's 1998 lineup. It features a Champagne dial protected by a Hardlex crystal and offers 60m of water resistance. [seikata-wm-01f639dc39b3]

Also known as: Tuna, Golden Tuna

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

45mm

Case Thickness

8.1mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Champagne

Jewels

25j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1998

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