Seiko Cal. 6671 - 821

The Seiko 6671-821 represents an important milestone in Seiko's 1974 lineup. The Inner Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-2f614b396b66]

Also known as: Bullhead, Emperor

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

37mm

Case Thickness

13.8mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

32j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1974

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