Seiko Cal. 4423 - 390

The Seiko 4423-390 represents an important milestone in Seiko's 1975 lineup. It features a White dial protected by a Sapphire crystal and offers 50m of water resistance. [seikata-wm-5327ed95f030]

Also known as: Monster

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

40mm

Case Thickness

14.4mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

50m

Dial Color

White

Jewels

20j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1975

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