Seiko Cal. 5640 - 827

This Quartz model from 1997 features a 42mm Two-Tone case. It features a Silver dial protected by a Mineral crystal and offers 100m of water resistance. [seikata-wm-24821f055def]

Also known as: Tuna, Bullhead

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

42mm

Case Thickness

10.4mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

100m

Dial Color

Silver

Jewels

29j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1997

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