Seiko Cal. 4422 - 631

This Spring Drive model from 1974 features a 42mm PVD Black case. It features a Navy dial protected by a Mineral crystal and offers 170m of water resistance. [seikata-wm-bca0e9729e38]

Also known as: Golden Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

42mm

Case Thickness

8.0mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Navy

Jewels

31j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1974

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