Seiko Cal. 4528 - 139

The 4528-139 is a sought-after Automatic piece from Seiko's golden era. It features a Black dial protected by a Hardlex crystal and offers 50m of water resistance. [seikata-wm-3a0c520d5eb7]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

42mm

Case Thickness

13.8mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Black

Jewels

27j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1970

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