Seiko Cal. 6641 - 751

This Hand-Winding model from 1971 features a 39mm Titanium case. Powered by the 6641 caliber with 28j jewels beating at 21,600 bph, it delivers a 50 hours power reserve. [seikata-wm-c9422fad901b]

Also known as: Sea Horse, Emperor

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

39mm

Case Thickness

10.1mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

130m

Dial Color

Black

Jewels

28j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1971

Related Models

• Seiko 6348-955
• Seiko 7040-842
• Seiko 4551-688
• Seiko 4555-630
• Seiko 3859-708
• Seiko 4556-778
• Seiko 7123-353
• Seiko 6343-705
• Seiko 5614-842
• Seiko 0730-721
• Seiko 5696-886
• Seiko 6655-766