Seiko Cal. 6634 - 331

The Seiko 6634-331 represents an important milestone in Seiko's 1991 lineup. It features a Cream dial protected by a Acrylic crystal and offers 30m of water resistance. [seikata-wm-cd85df89ef7b]

Also known as: Sumo, Helmet

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

15.1mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Cream

Jewels

36j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1991

Related Models

• Seiko 6258-491
• Seiko 6110-890
• Seiko 7057-539
• Seiko 3896-185
• Seiko 6228-774
• Seiko 6238-961
• Seiko 4443-905
• Seiko 4429-221
• Seiko 6140-651
• Seiko 7116-652
• Seiko 7183-935
• Seiko 5696-653