Seiko Cal. 4423 - 647

The Seiko 4423-647 represents an important milestone in Seiko's 1986 lineup. It features a Burgundy dial protected by a Acrylic crystal and offers 60m of water resistance. [seikata-wm-3523af08ad18]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

43mm

Case Thickness

8.1mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

60m

Dial Color

Burgundy

Jewels

34j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1986

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