Seiko Cal. 6631 - 778

The Seiko 6631-778 represents an important milestone in Seiko's 1999 lineup. It features a Navy dial protected by a Hardlex crystal and offers 150m of water resistance. [seikata-wm-0415183da758]

Also known as: UFO

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

38mm

Case Thickness

14.1mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

Navy

Jewels

27j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1999

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