Seiko Cal. 6691 - 639

The Seiko 6691-639 represents an important milestone in Seiko's 1967 lineup. It features a Cream dial protected by a Hardlex crystal and offers 60m of water resistance. [seikata-wm-87ecbe7f366a]

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

43mm

Case Thickness

11.0mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Cream

Jewels

33j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1967

Related Models

• Seiko 0728-830
• Seiko 5666-899
• Seiko 4597-982
• Seiko 4534-117
• Seiko 6138-583
• Seiko 5612-644
• Seiko 5657-733
• Seiko 6267-479
• Seiko 4486-209
• Seiko 6697-961
• Seiko 5619-653
• Seiko 6196-281