Seiko Cal. 6231 - 133

The Seiko 6231-133 represents an important milestone in Seiko's 1981 lineup. Powered by the 6231 caliber with 18j jewels beating at 21,600 bph, it delivers a 51 hours power reserve. [seikata-wm-185c73426ce3]

Also known as: Tuna, Baby Tuna

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

13.6mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Champagne

Jewels

18j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1981

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