Seiko Cal. 4441 - 520

This Automatic model from 1972 features a 36mm Hardlex-Coated Steel case. It features a Silver dial protected by a Mineral crystal and offers 140m of water resistance. [seikata-wm-6bf440c0d9c2]

Also known as: Tuna, Helmet

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

12.1mm

Lug Width

19mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Silver

Jewels

21j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1972

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