Seiko Cal. 5255 - 643

This Spring Drive model from 1986 features a 40mm Hardlex-Coated Steel case. It features a Blue Sunburst dial protected by a Hardlex crystal and offers 110m of water resistance. [seikata-wm-0a0322c7eed1]

Also known as: Tuna, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

9.5mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Blue Sunburst

Jewels

18j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1986

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