Seiko Cal. 5623 - 422

This Spring Drive model from 1991 features a 36mm PVD Black case. It features a Navy dial protected by a Mineral crystal and offers 30m of water resistance. [seikata-wm-c1e00df6eca8]

Also known as: Tuna, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

36mm

Case Thickness

11.6mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

30m

Dial Color

Navy

Jewels

22j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1991

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