Seiko Cal. 6388 - 690

The Seiko 6388-690 represents an important milestone in Seiko's 1981 lineup. Powered by the 6388 caliber with 23j jewels beating at 36,000 bph, it delivers a 43 hours power reserve. [seikata-wm-caf0d1ac67e7]

Also known as: UFO

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

37mm

Case Thickness

14.9mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Green

Jewels

23j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1981

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