Seiko Cal. 5631 - 558

The 5631-558 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Navy dial protected by a Hardlex crystal and offers 120m of water resistance. [seikata-wm-38e48b90dcb2]

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

36mm

Case Thickness

9.1mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Navy

Jewels

30j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1979

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