Seiko Cal. 5631 - 918

The Seiko 5631-918 represents an important milestone in Seiko's 1993 lineup. The Rotating bezel and 34mm case give it a distinctive presence on the wrist. [seikata-wm-45f3534366a0]

Also known as: Rally

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

34mm

Case Thickness

8.6mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

190m

Dial Color

Burgundy

Jewels

28j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1993

Related Models

• Seiko 5254-218
• Seiko 7144-588
• Seiko 4490-476
• Seiko 6621-316
• Seiko 5685-135
• Seiko 5686-874
• Seiko 6660-947
• Seiko 4530-245
• Seiko 3885-628
• Seiko 7190-286
• Seiko 6318-144
• Seiko 6198-411