Seiko Cal. 4538 - 331

The Seiko 4538-331 represents an important milestone in Seiko's 1978 lineup. It features a Blue Sunburst dial protected by a Acrylic crystal and offers 140m of water resistance. [seikata-wm-93ab05dd9c0a]

Also known as: Pogue, Helmet

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

39mm

Case Thickness

13.1mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Blue Sunburst

Jewels

19j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1978

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