Seiko Cal. 4538 - 728

The Seiko 4538-728 represents an important milestone in Seiko's 1969 lineup. It features a Burgundy dial protected by a Acrylic crystal and offers 190m of water resistance. [seikata-wm-62b870899a3e]

Also known as: Tuna, World Timer

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

10.6mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Burgundy

Jewels

30j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1969

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