Seiko Cal. 6687 - 439

This Spring Drive model from 1972 features a 34mm Hardlex-Coated Steel case. It features a White dial protected by a Sapphire crystal and offers 170m of water resistance. [seikata-wm-dc4a86f968d8]

Also known as: Rally, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

15.2mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

170m

Dial Color

White

Jewels

25j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1972

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