Seiko Cal. 6331 - 590

The 6331-590 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6331 caliber with 24j jewels beating at 28,800 bph, it delivers a 52 hours power reserve. [seikata-wm-2e0bf68edd9a]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

34mm

Case Thickness

12.3mm

Lug Width

19mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Blue Sunburst

Jewels

24j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1988

Related Models

• Seiko 3897-402
• Seiko 5246-742
• Seiko 6258-846
• Seiko 5225-992
• Seiko 4524-166
• Seiko 6330-546
• Seiko 5698-462
• Seiko 5238-944
• Seiko 4535-589
• Seiko 6327-797
• Seiko 6345-992
• Seiko 6199-104