Seiko Cal. 6639 - 423

The Seiko 6639-423 represents an important milestone in Seiko's 1966 lineup. The Coin-Edge bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-cc7d77b0e26b]

Also known as: Pogue, Bellmatic

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

44mm

Case Thickness

13.1mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Burgundy

Jewels

33j

Frequency

21,600 bph

Power Reserve

72 hours

Year

1966

Related Models

• Seiko 0710-594
• Seiko 3877-469
• Seiko 5665-945
• Seiko 4466-466
• Seiko 6289-949
• Seiko 0728-179
• Seiko 4511-808
• Seiko 7172-391
• Seiko 5254-252
• Seiko 3850-172
• Seiko 6357-116
• Seiko 6681-215