Seiko Cal. 6391 - 690

The Seiko 6391-690 represents an important milestone in Seiko's 1981 lineup. The Rotating bezel and 34mm case give it a distinctive presence on the wrist. [seikata-wm-5671cebadc1a]

Also known as: Baby Tuna

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

34mm

Case Thickness

13.6mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

70m

Dial Color

Silver

Jewels

21j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1981

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