Seiko Cal. 6331 - 167

The Seiko 6331-167 represents an important milestone in Seiko's 1977 lineup. The Bidirectional bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-4a3865b08113]

Also known as: UFO, Baby Tuna

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

46mm

Case Thickness

10.6mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Green

Jewels

36j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1977

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