Seiko Cal. 6639 - 857

This Automatic model from 1976 features a 36mm Hardlex-Coated Steel case. With its 21mm lug width and 10.7mm profile, it sits comfortably on most wrists. [seikata-wm-2ac2c62ff4fe]

Also known as: Flighty

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

10.7mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Black

Jewels

18j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1976

Related Models

• Seiko 7034-490
• Seiko 6619-462
• Seiko 6258-169
• Seiko 4587-452
• Seiko 7084-318
• Seiko 6174-799
• Seiko 5263-580
• Seiko 7037-492
• Seiko 3839-397
• Seiko 7067-168
• Seiko 7013-122
• Seiko 4534-728