Seiko Cal. 6639 - 260

The Seiko 6639-260 represents an important milestone in Seiko's 1972 lineup. The Bidirectional bezel and 35mm case give it a distinctive presence on the wrist. [seikata-wm-40c21f26e87d]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

35mm

Case Thickness

9.1mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Champagne

Jewels

18j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1972

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