Seiko Cal. 6645 - 163

The Seiko 6645-163 represents an important milestone in Seiko's 1978 lineup. The Bidirectional bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-f4acfe423e79]

Also known as: UFO, Silverwave

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

46mm

Case Thickness

9.2mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Burgundy

Jewels

21j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1978

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