Seiko Cal. 6668 - 657

The Seiko 6668-657 represents an important milestone in Seiko's 1977 lineup. It features a Blue Sunburst dial protected by a Mineral crystal and offers 180m of water resistance. [seikata-wm-e4cbaa834a8d]

Also known as: Monster

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

38mm

Case Thickness

14.2mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

26j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1977

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