Seiko Cal. 0731 - 233

The 0731-233 is a sought-after Automatic piece from Seiko's golden era. Powered by the 0731 caliber with 25j jewels beating at 21,600 bph, it delivers a 59 hours power reserve. [seikata-wm-9fcea629d1f7]

Also known as: Bullhead

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

42mm

Case Thickness

9.3mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Cream

Jewels

25j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1980

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