Seiko Cal. 6637 - 797

The Seiko 6637-797 represents an important milestone in Seiko's 1976 lineup. It features a Black dial protected by a Hardlex crystal and offers 150m of water resistance. [seikata-wm-323ecb86cc25]

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

43mm

Case Thickness

13.4mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Black

Jewels

24j

Frequency

21,600 bph

Power Reserve

68 hours

Year

1976

Related Models

• Seiko 3854-204
• Seiko 0750-944
• Seiko 6189-182
• Seiko 5655-492
• Seiko 7021-465
• Seiko 7023-927
• Seiko 3880-931
• Seiko 6219-128
• Seiko 7142-328
• Seiko 7113-627
• Seiko 5672-490
• Seiko 5698-743