Seiko Cal. 6390 - 531

The Seiko 6390-531 represents an important milestone in Seiko's 1993 lineup. Powered by the 6390 caliber with 33j jewels beating at 21,600 bph, it delivers a 56 hours power reserve. [seikata-wm-50a6613720ee]

Also known as: Sportsmatic, Golden Tuna

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

39mm

Case Thickness

8.1mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

150m

Dial Color

Green

Jewels

33j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1993

Related Models

• Seiko 5618-593
• Seiko 7138-695
• Seiko 6643-721
• Seiko 6223-455
• Seiko 7037-604
• Seiko 6654-945
• Seiko 6689-368
• Seiko 7129-526
• Seiko 0761-287
• Seiko 5657-555
• Seiko 5213-681
• Seiko 3871-335