Seiko Cal. 4420 - 110

This Hand-Winding model from 1971 features a 35mm PVD Black case. It features a Silver dial protected by a Mineral crystal and offers 60m of water resistance. [seikata-wm-7b5bc759f548]

Also known as: Sumo, Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

35mm

Case Thickness

12.4mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Silver

Jewels

28j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1971

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