Seiko Cal. 6390 - 663

This Solar model from 1973 features a 43mm Titanium case. Powered by the 6390 caliber with 28j jewels beating at 21,600 bph, it delivers a 41 hours power reserve. [seikata-wm-cd3d6c5e91a2]

Also known as: Golden Tuna

Specifications

Movement

Solar

Case Material

Titanium

Case Width

43mm

Case Thickness

10.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Silver

Jewels

28j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1973

Related Models

• Seiko 5210-720
• Seiko 5212-586
• Seiko 4556-443
• Seiko 6216-217
• Seiko 6375-699
• Seiko 6127-506
• Seiko 5243-541
• Seiko 3880-575
• Seiko 4549-900
• Seiko 5679-854
• Seiko 7065-926
• Seiko 7016-582