Seiko Cal. 6631 - 325

This Quartz model from 1979 features a 40mm PVD Black case. Powered by the 6631 caliber with 25j jewels beating at 28,800 bph, it delivers a 41 hours power reserve. [seikata-wm-ba62ab7a4fe1]

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

40mm

Case Thickness

14.3mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

40m

Dial Color

Cream

Jewels

25j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1979

Related Models

• Seiko 4524-191
• Seiko 4454-149
• Seiko 6614-335
• Seiko 6252-880
• Seiko 4598-417
• Seiko 3814-579
• Seiko 0744-336
• Seiko 0770-721
• Seiko 5646-149
• Seiko 4491-298
• Seiko 4537-406
• Seiko 5290-596