Seiko Cal. 6390 - 744

The Seiko 6390-744 represents an important milestone in Seiko's 1977 lineup. The Inner Rotating bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-fe2cf34449eb]

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

39mm

Case Thickness

11.3mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Green

Jewels

26j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1977

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