Seiko Cal. 4431 - 420

The Seiko 4431-420 represents an important milestone in Seiko's 1994 lineup. Powered by the 4431 caliber with 25j jewels beating at 21,600 bph, it delivers a 67 hours power reserve. [seikata-wm-1da25af6bcee]

Also known as: Turtle

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

45mm

Case Thickness

11.2mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Black

Jewels

25j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1994

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