Seiko Cal. 6331 - 109

The 6331-109 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6331 caliber with 30j jewels beating at 21,600 bph, it delivers a 69 hours power reserve. [seikata-wm-77539b0411d3]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

38mm

Case Thickness

9.5mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Burgundy

Jewels

30j

Frequency

21,600 bph

Power Reserve

69 hours

Year

1992

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