Seiko Cal. 5646 - 340

The Seiko 5646-340 represents an important milestone in Seiko's 1966 lineup. The Rotating bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-2cdd2de576ed]

Also known as: UFO

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

42mm

Case Thickness

13.5mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

30m

Dial Color

Black

Jewels

21j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1966

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