Seiko Cal. 6647 - 100

The Seiko 6647-100 represents an important milestone in Seiko's 1979 lineup. The Bidirectional bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-8ae702cee02b]

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

8.9mm

Lug Width

19mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Silver

Jewels

28j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1979

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