Seiko Cal. 4428 - 590

This Hand-Winding model from 1970 features a 42mm PVD Black case. It features a Champagne dial protected by a Mineral crystal and offers 140m of water resistance. [seikata-wm-c7e426f16821]

Also known as: Sumo, Helmet

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

42mm

Case Thickness

15.2mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Champagne

Jewels

17j

Frequency

21,600 bph

Power Reserve

69 hours

Year

1970

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