Seiko Cal. 4423 - 645

The Seiko 4423-645 represents an important milestone in Seiko's 1985 lineup. The Inner Rotating bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-3cfad6f76065]

Also known as: Samurai, Helmet

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

45mm

Case Thickness

9.6mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Black

Jewels

21j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1985

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