Seiko Cal. 6645 - 681

The Seiko 6645-681 represents an important milestone in Seiko's 1965 lineup. The Fixed bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-b820f6cb2142]

Also known as: Baby Tuna, Flighty

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

15.1mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

30m

Dial Color

Green

Jewels

24j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1965

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