Seiko Cal. 6640 - 151

The Seiko 6640-151 represents an important milestone in Seiko's 1985 lineup. The Coin-Edge bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-e29ed481ca41]

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

46mm

Case Thickness

12.2mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Navy

Jewels

18j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1985

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