Seiko Cal. 6635 - 177

This Spring Drive model from 1973 features a 40mm PVD Black case. With its 18mm lug width and 12.2mm profile, it sits comfortably on most wrists. [seikata-wm-dbf84eafe649]

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

12.2mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Navy

Jewels

33j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1973

Related Models

• Seiko 7158-154
• Seiko 6629-967
• Seiko 6131-923
• Seiko 5259-918
• Seiko 5274-815
• Seiko 6658-860
• Seiko 0740-356
• Seiko 4596-221
• Seiko 5237-604
• Seiko 5637-381
• Seiko 3828-495
• Seiko 6335-211