Seiko Cal. 6657 - 742

The Seiko 6657-742 represents an important milestone in Seiko's 1988 lineup. It features a Blue Sunburst dial protected by a Mineral crystal and offers 180m of water resistance. [seikata-wm-927936849fdf]

Also known as: Samurai, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

9.0mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

34j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1988

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