Seiko Cal. 6631 - 515

The Seiko 6631-515 represents an important milestone in Seiko's 1980 lineup. It features a White dial protected by a Hardlex crystal and offers 180m of water resistance. [seikata-wm-61fc86b1e4aa]

Also known as: UFO, Crown

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

13.7mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

180m

Dial Color

White

Jewels

28j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1980

Related Models

• Seiko 5282-139
• Seiko 3851-187
• Seiko 0787-362
• Seiko 6327-119
• Seiko 6193-435
• Seiko 0764-213
• Seiko 3866-826
• Seiko 6124-319
• Seiko 6297-982
• Seiko 6311-677
• Seiko 3822-953
• Seiko 3823-759