Seiko Cal. 6311 - 531

Released in 1978, the Cal. 6311 with design code 531 was part of Seiko's domestic market collection. With its 21mm lug width and 15.6mm profile, it sits comfortably on most wrists. [seikata-wm-f0bcd9fe068c]

Also known as: Sea Horse, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

36mm

Case Thickness

15.6mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

180m

Dial Color

Black

Jewels

28j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1978

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