Seiko Cal. 6642 - 399

The Seiko 6642-399 represents an important milestone in Seiko's 1977 lineup. The Inner Rotating bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-171d8a6fb4c1]

Also known as: Emperor, Flighty

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

12.8mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

22j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1977

Related Models

• Seiko 4555-549
• Seiko 4597-725
• Seiko 5628-586
• Seiko 6632-525
• Seiko 4457-939
• Seiko 0792-193
• Seiko 6116-309
• Seiko 5696-380
• Seiko 7157-337
• Seiko 6684-507
• Seiko 6657-101
• Seiko 5629-151