Seiko Cal. 5638 - 556

The 5638-556 is a sought-after Quartz piece from Seiko's golden era. It features a Black dial protected by a Hardlex crystal and offers 50m of water resistance. [seikata-wm-ee5c25b90b15]

Also known as: Sea Horse, Crown

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

37mm

Case Thickness

15.9mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Black

Jewels

28j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1985

Related Models

• Seiko 7061-566
• Seiko 6176-610
• Seiko 6651-486
• Seiko 0748-794
• Seiko 6282-655
• Seiko 5233-404
• Seiko 5657-686
• Seiko 5661-243
• Seiko 6139-395
• Seiko 4513-722
• Seiko 5683-688
• Seiko 3894-192