Seiko Cal. 6639 - 271

The Seiko 6639-271 represents an important milestone in Seiko's 1970 lineup. The Bidirectional bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-dc4cd7e0a2ac]

Also known as: Baby Tuna, Flighty

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

15.4mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Green

Jewels

36j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1970

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