Seiko Cal. 6331 - 623

Released in 1973, the Cal. 6331 with design code 623 was part of Seiko's domestic market collection. With its 20mm lug width and 13.4mm profile, it sits comfortably on most wrists. [seikata-wm-9231dd1fa2b9]

Also known as: Golden Tuna

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

13.4mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Green

Jewels

18j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1973

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