Seiko Cal. 5644 - 857

This Quartz model from 1987 features a 39mm Hardlex-Coated Steel case. It features a Navy dial protected by a Sapphire crystal and offers 100m of water resistance. [seikata-wm-e0c4a0b2e761]

Also known as: Rally, Navigator

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

10.0mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Navy

Jewels

31j

Frequency

21,600 bph

Power Reserve

58 hours

Year

1987

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