Seiko Cal. 6637 - 169

The Seiko 6637-169 represents an important milestone in Seiko's 1978 lineup. With its 18mm lug width and 13.2mm profile, it sits comfortably on most wrists. [seikata-wm-b21bb5186ff8]

Also known as: Tuna, Silverwave

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

13.2mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Green

Jewels

28j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1978

Related Models

• Seiko 6154-268
• Seiko 6263-468
• Seiko 6245-668
• Seiko 3856-983
• Seiko 5259-123
• Seiko 5293-509
• Seiko 6218-218
• Seiko 7123-941
• Seiko 3841-606
• Seiko 6626-358
• Seiko 6178-293
• Seiko 7174-870