Seiko Cal. 5631 - 270

The Seiko 5631-270 represents an important milestone in Seiko's 1978 lineup. The Inner Rotating bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-279ee75115c0]

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

10.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Blue Sunburst

Jewels

34j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1978

Related Models

• Seiko 3884-831
• Seiko 4524-596
• Seiko 0766-360
• Seiko 6341-346
• Seiko 5240-113
• Seiko 4598-851
• Seiko 3852-169
• Seiko 6325-764
• Seiko 7134-573
• Seiko 6247-535
• Seiko 4534-948
• Seiko 6294-753