Seiko Cal. 6388 - 931

Released in 1967, the Cal. 6388 with design code 931 was part of Seiko's domestic market collection. The Inner Rotating bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-e690de0be4d2]

Also known as: Rally, Sea Horse

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

42mm

Case Thickness

9.3mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Champagne

Jewels

32j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1967

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