Seiko Cal. 5640 - 388

This Spring Drive model from 1998 features a 46mm Two-Tone case. The Coin-Edge bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-36bfc6a69a7c]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

46mm

Case Thickness

9.9mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

White

Jewels

22j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1998

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