Seiko Cal. 6631 - 978

This Kinetic model from 1975 features a 37mm Gold-Plated case. Powered by the 6631 caliber with 29j jewels beating at 21,600 bph, it delivers a 70 hours power reserve. [seikata-wm-06acf5ccb836]

Also known as: Emperor

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

9.6mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

70m

Dial Color

Green

Jewels

29j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1975

Related Models

• Seiko 5622-478
• Seiko 0732-900
• Seiko 5239-552
• Seiko 6189-990
• Seiko 4537-463
• Seiko 3824-975
• Seiko 4514-599
• Seiko 6299-301
• Seiko 7093-162
• Seiko 5236-880
• Seiko 6667-922
• Seiko 6148-660