Seiko Cal. 7031 - 831

The Seiko 7031-831 represents an important milestone in Seiko's 1981 lineup. The Bidirectional bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-420f66e51b52]

Also known as: Samurai, UFO

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

43mm

Case Thickness

10.8mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Black

Jewels

27j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1981

Related Models

• Seiko 7132-629
• Seiko 7145-358
• Seiko 4566-471
• Seiko 4498-885
• Seiko 7024-126
• Seiko 7159-956
• Seiko 7011-527
• Seiko 7098-709
• Seiko 6657-335
• Seiko 6279-579
• Seiko 3828-341
• Seiko 4417-923