Seiko Cal. 6387 - 631

This Spring Drive model from 1997 features a 35mm Two-Tone case. It features a Burgundy dial protected by a Sapphire crystal and offers 40m of water resistance. [seikata-wm-28462b84bf2c]

Also known as: World Timer, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

35mm

Case Thickness

10.8mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Burgundy

Jewels

18j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1997

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