Seiko Cal. 5648 - 366

This Spring Drive model from 1968 features a 39mm Gold-Plated case. Powered by the 5648 caliber with 19j jewels beating at 28,800 bph, it delivers a 59 hours power reserve. [seikata-wm-72b84c89e91b]

Also known as: Sumo, UFO

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

12.4mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Black

Jewels

19j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1968

Related Models

• Seiko 6248-975
• Seiko 6610-507
• Seiko 7019-351
• Seiko 0762-223
• Seiko 7151-385
• Seiko 6139-821
• Seiko 6655-556
• Seiko 6655-913
• Seiko 5237-891
• Seiko 5212-103
• Seiko 7015-667
• Seiko 7083-349