Seiko Cal. 6331 - 380

Released in 1983, the Cal. 6331 with design code 380 was part of Seiko's domestic market collection. Powered by the 6331 caliber with 36j jewels beating at 36,000 bph, it delivers a 56 hours power reserve. [seikata-wm-cbf4bd09059e]

Also known as: Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

45mm

Case Thickness

13.6mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

White

Jewels

36j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1983

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