Seiko Cal. 6397 - 257

This Spring Drive model from 1987 features a 46mm Hardlex-Coated Steel case. It features a Silver dial protected by a Acrylic crystal and offers 160m of water resistance. [seikata-wm-26a6e6315758]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

8.4mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

160m

Dial Color

Silver

Jewels

32j

Frequency

28,800 bph

Power Reserve

69 hours

Year

1987

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