Seiko Cal. 6631 - 206

This Spring Drive model from 1991 features a 41mm Titanium case. The Coin-Edge bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-1cecb3754a9a]

Also known as: Crown, Emperor

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

41mm

Case Thickness

9.3mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Silver

Jewels

27j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1991

Related Models

• Seiko 5612-234
• Seiko 7157-153
• Seiko 0790-321
• Seiko 4555-527
• Seiko 5239-727
• Seiko 6197-335
• Seiko 7035-494
• Seiko 7182-997
• Seiko 4463-453
• Seiko 7017-635
• Seiko 4534-227
• Seiko 7188-511