Seiko Cal. 6630 - 631

Released in 1973, the Cal. 6630 with design code 631 was part of Seiko's domestic market collection. It features a White dial protected by a Acrylic crystal and offers 60m of water resistance. [seikata-wm-ae38ef54a996]

Also known as: Arnie

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

13.7mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

60m

Dial Color

White

Jewels

28j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1973

Related Models

• Seiko 5661-764
• Seiko 6320-417
• Seiko 6139-156
• Seiko 3817-317
• Seiko 4597-896
• Seiko 5230-904
• Seiko 6291-329
• Seiko 4495-694
• Seiko 6618-787
• Seiko 6151-627
• Seiko 4421-831
• Seiko 6328-485