Seiko Cal. 4538 - 645

Released in 1976, the Cal. 4538 with design code 645 was part of Seiko's domestic market collection. It features a Green dial protected by a Hardlex crystal and offers 90m of water resistance. [seikata-wm-b3cb69dc349b]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

34mm

Case Thickness

13.4mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

90m

Dial Color

Green

Jewels

19j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1976

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