Seiko Cal. 6687 - 356

This Quartz model from 1973 features a 39mm Two-Tone case. It features a White dial protected by a Mineral crystal and offers 30m of water resistance. [seikata-wm-756dae5aee0b]

Also known as: Helmet, Arnie

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

39mm

Case Thickness

9.9mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

30m

Dial Color

White

Jewels

28j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1973

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