Seiko Cal. 6231 - 735

This Automatic model from 1991 features a 39mm PVD Black case. Powered by the 6231 caliber with 31j jewels beating at 28,800 bph, it delivers a 52 hours power reserve. [seikata-wm-df8a2bf17fd7]

Also known as: Turtle

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

39mm

Case Thickness

10.6mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

180m

Dial Color

Cream

Jewels

31j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1991

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