Seiko Cal. 6630 - 365

This Spring Drive model from 1982 features a 39mm Stainless Steel case. Powered by the 6630 caliber with 36j jewels beating at 28,800 bph, it delivers a 71 hours power reserve. [seikata-wm-c0ae78d48690]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

13.1mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Navy

Jewels

36j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1982

Related Models

• Seiko 4496-993
• Seiko 6640-117
• Seiko 6188-667
• Seiko 6142-178
• Seiko 0735-966
• Seiko 5635-309
• Seiko 6651-732
• Seiko 7136-913
• Seiko 7062-491
• Seiko 6248-692
• Seiko 5684-785
• Seiko 6284-644