Seiko Cal. 6687 - 712

Released in 1981, the Cal. 6687 with design code 712 was part of Seiko's domestic market collection. It features a White dial protected by a Hardlex crystal and offers 50m of water resistance. [seikata-wm-9a05ca4290d5]

Also known as: Sportsmatic

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

42mm

Case Thickness

10.6mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

White

Jewels

28j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1981

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