Seiko Cal. 5611 - 766

This Spring Drive model from 1970 features a 36mm Hardlex-Coated Steel case. With its 18mm lug width and 8.9mm profile, it sits comfortably on most wrists. [seikata-wm-9b8d1299bc80]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

8.9mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Blue Sunburst

Jewels

17j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1970

Related Models

• Seiko 4462-960
• Seiko 6390-270
• Seiko 7115-378
• Seiko 7033-380
• Seiko 4497-277
• Seiko 6215-765
• Seiko 5652-436
• Seiko 3832-304
• Seiko 7173-532
• Seiko 5646-640
• Seiko 3897-128
• Seiko 6621-723