Seiko Cal. 4420 - 317

This Spring Drive model from 1965 features a 41mm Two-Tone case. It features a Black dial protected by a Mineral crystal and offers 160m of water resistance. [seikata-wm-cf615f0dd179]

Also known as: Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

41mm

Case Thickness

10.2mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

160m

Dial Color

Black

Jewels

31j

Frequency

21,600 bph

Power Reserve

58 hours

Year

1965

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