Seiko Cal. 6691 - 547

This Hand-Winding model from 1982 features a 38mm Titanium case. With its 19mm lug width and 9.9mm profile, it sits comfortably on most wrists. [seikata-wm-329303797c3d]

Also known as: Bullhead, Helmet

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

38mm

Case Thickness

9.9mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

White

Jewels

30j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1982

Related Models

• Seiko 3847-767
• Seiko 6187-485
• Seiko 7152-472
• Seiko 6360-401
• Seiko 6156-449
• Seiko 5682-943
• Seiko 5277-993
• Seiko 6273-870
• Seiko 4442-644
• Seiko 7189-618
• Seiko 5663-645
• Seiko 6252-287