Seiko Cal. 6331 - 287

The 6331-287 is a sought-after Automatic piece from Seiko's golden era. The Inner Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-116eb7cf9268]

Also known as: Baby Tuna

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

8.5mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

White

Jewels

30j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1967

Related Models

• Seiko 6377-710
• Seiko 4582-270
• Seiko 7151-698
• Seiko 3820-722
• Seiko 6257-374
• Seiko 3891-907
• Seiko 6348-652
• Seiko 7145-685
• Seiko 0782-564
• Seiko 6328-833
• Seiko 3860-977
• Seiko 6213-192