Seiko Cal. 6331 - 523

The Seiko 6331-523 represents an important milestone in Seiko's 1973 lineup. The Inner Rotating bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-263c8372cf1a]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

43mm

Case Thickness

11.9mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Silver

Jewels

18j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1973

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