Seiko Cal. 6390 - 642

The Seiko 6390-642 represents an important milestone in Seiko's 1965 lineup. The Inner Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-422da690a86f]

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

11.1mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Silver

Jewels

23j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1965

Related Models

• Seiko 7084-690
• Seiko 0753-613
• Seiko 4421-710
• Seiko 7131-423
• Seiko 7066-368
• Seiko 7088-909
• Seiko 5611-730
• Seiko 6258-782
• Seiko 3882-221
• Seiko 7013-494
• Seiko 4546-183
• Seiko 3845-665