Seiko Cal. 6331 - 998

The 6331-998 is a sought-after Automatic piece from Seiko's golden era. With its 22mm lug width and 12.6mm profile, it sits comfortably on most wrists. [seikata-wm-8fe9ee02dc3e]

Also known as: Monster

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

12.6mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Champagne

Jewels

31j

Frequency

21,600 bph

Power Reserve

68 hours

Year

1987

Related Models

• Seiko 6330-288
• Seiko 6320-808
• Seiko 5261-604
• Seiko 6363-117
• Seiko 6691-234
• Seiko 5230-608
• Seiko 4586-802
• Seiko 3821-634
• Seiko 7134-912
• Seiko 7098-169
• Seiko 3875-136
• Seiko 5217-156