Seiko Cal. 4428 - 636

The 4428-636 is a sought-after Spring Drive piece from Seiko's golden era. It features a Silver dial protected by a Acrylic crystal and offers 100m of water resistance. [seikata-wm-92c645086498]

Also known as: Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

35mm

Case Thickness

13.0mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Silver

Jewels

30j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1993

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