Seiko Cal. 5631 - 271

The Seiko 5631-271 represents an important milestone in Seiko's 1976 lineup. The Bidirectional bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-c61a304a09e3]

Also known as: Panda, Arnie

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

37mm

Case Thickness

14.8mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Champagne

Jewels

32j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1976

Related Models

• Seiko 4412-282
• Seiko 4494-169
• Seiko 4459-605
• Seiko 0761-233
• Seiko 5242-948
• Seiko 6327-620
• Seiko 5658-342
• Seiko 6352-289
• Seiko 5663-358
• Seiko 7017-751
• Seiko 6250-513
• Seiko 6335-985