Seiko Cal. 7139 - 727

The Seiko 7139-727 represents an important milestone in Seiko's 1971 lineup. Powered by the 7139 caliber with 27j jewels beating at 28,800 bph, it delivers a 60 hours power reserve. [seikata-wm-6fec35143203]

Also known as: Sumo

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

37mm

Case Thickness

15.4mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

50m

Dial Color

Black

Jewels

27j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1971

Related Models

• Seiko 5297-818
• Seiko 7199-912
• Seiko 6632-113
• Seiko 0716-286
• Seiko 7070-770
• Seiko 4514-736
• Seiko 5685-512
• Seiko 5658-597
• Seiko 6127-619
• Seiko 6260-786
• Seiko 0754-193
• Seiko 0738-582