Seiko Cal. 6634 - 978

Released in 1965, the Cal. 6634 with design code 978 was part of Seiko's domestic market collection. The Inner Rotating bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-ab448db9e0a6]

Also known as: Silverwave, Emperor

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

43mm

Case Thickness

8.9mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

32j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1965

Related Models

• Seiko 6663-833
• Seiko 0785-419
• Seiko 3890-860
• Seiko 6172-128
• Seiko 5228-255
• Seiko 6327-206
• Seiko 3893-159
• Seiko 4575-815
• Seiko 4446-793
• Seiko 4419-832
• Seiko 5253-987
• Seiko 7035-650