Seiko Cal. 6631 - 131

The 6631-131 is a sought-after Automatic piece from Seiko's golden era. The Rotating bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-eae78af81662]

Also known as: Monster, Sportsmatic

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

43mm

Case Thickness

11.7mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

190m

Dial Color

Navy

Jewels

25j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1993

Related Models

• Seiko 4548-832
• Seiko 5244-763
• Seiko 6378-226
• Seiko 6132-754
• Seiko 3834-531
• Seiko 7199-629
• Seiko 3896-189
• Seiko 4485-585
• Seiko 4487-167
• Seiko 5254-948
• Seiko 6680-976
• Seiko 7031-391