Seiko Cal. 6670 - 821

The Seiko 6670-821 represents an important milestone in Seiko's 1985 lineup. It features a White dial protected by a Sapphire crystal and offers 50m of water resistance. [seikata-wm-f1f25e411e7e]

Also known as: Sumo, Sportsmatic

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

12.2mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

White

Jewels

28j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1985

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