Seiko Cal. 6640 - 756

The Seiko 6640-756 represents an important milestone in Seiko's 1982 lineup. The Rotating bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-fd6f0aa77eac]

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

46mm

Case Thickness

14.6mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

40m

Dial Color

Green

Jewels

18j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1982

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