Seiko Cal. 4528 - 388

This Kinetic model from 1971 features a 40mm PVD Black case. It features a Navy dial protected by a Mineral crystal and offers 60m of water resistance. [seikata-wm-731d1959b262]

Also known as: Helmet, Arnie

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

40mm

Case Thickness

15.8mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

Navy

Jewels

21j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1971

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