Seiko Cal. 6399 - 634

The Seiko 6399-634 represents an important milestone in Seiko's 1980 lineup. Powered by the 6399 caliber with 23j jewels beating at 28,800 bph, it delivers a 60 hours power reserve. [seikata-wm-236bc511852d]

Also known as: Tuna

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

41mm

Case Thickness

12.6mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Burgundy

Jewels

23j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1980

Related Models

• Seiko 3840-918
• Seiko 7197-865
• Seiko 6361-691
• Seiko 6216-694
• Seiko 5673-797
• Seiko 5683-944
• Seiko 7131-891
• Seiko 6646-458
• Seiko 7039-518
• Seiko 4483-210
• Seiko 5221-386
• Seiko 6317-493