Seiko Cal. 5638 - 399

The Seiko 5638-399 represents an important milestone in Seiko's 1999 lineup. It features a Black dial protected by a Sapphire crystal and offers 180m of water resistance. [seikata-wm-f57a20fc182a]

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

11.3mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Black

Jewels

17j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1999

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