Seiko Cal. 6357 - 657

This Spring Drive model from 1977 features a 40mm Two-Tone case. The Coin-Edge bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-ba6b8462c2d4]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

40mm

Case Thickness

10.8mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Blue Sunburst

Jewels

19j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1977

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