Seiko Cal. 6634 - 421

The Seiko 6634-421 represents an important milestone in Seiko's 1990 lineup. It features a Navy dial protected by a Hardlex crystal and offers 100m of water resistance. [seikata-wm-ca5eefde464c]

Also known as: Sea Horse

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

42mm

Case Thickness

9.5mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Navy

Jewels

36j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1990

Related Models

• Seiko 5635-731
• Seiko 7196-244
• Seiko 6339-677
• Seiko 4592-420
• Seiko 6144-462
• Seiko 7143-296
• Seiko 3856-303
• Seiko 5693-503
• Seiko 7156-298
• Seiko 4464-664
• Seiko 4475-280
• Seiko 4573-196