Seiko Cal. 7139 - 764

The Seiko 7139-764 represents an important milestone in Seiko's 1968 lineup. Powered by the 7139 caliber with 36j jewels beating at 36,000 bph, it delivers a 55 hours power reserve. [seikata-wm-d573c2492a02]

Also known as: World Timer, Sea Horse

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

44mm

Case Thickness

13.9mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

120m

Dial Color

Green

Jewels

36j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1968

Related Models

• Seiko 7062-737
• Seiko 7040-101
• Seiko 7055-645
• Seiko 6391-962
• Seiko 4564-828
• Seiko 5620-117
• Seiko 6666-380
• Seiko 0711-810
• Seiko 6363-758
• Seiko 6612-433
• Seiko 5624-581
• Seiko 6312-969