Seiko Cal. 6131 - 665

The Seiko 6131-665 represents an important milestone in Seiko's 1965 lineup. With its 18mm lug width and 10.6mm profile, it sits comfortably on most wrists. [seikata-wm-8b050df8ee53]

Also known as: Bullhead, Rally

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

34mm

Case Thickness

10.6mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

150m

Dial Color

Burgundy

Jewels

33j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1965

Related Models

• Seiko 4486-189
• Seiko 4522-424
• Seiko 7115-785
• Seiko 4587-633
• Seiko 5693-997
• Seiko 5667-233
• Seiko 6388-582
• Seiko 7054-711
• Seiko 6340-792
• Seiko 0776-632
• Seiko 6666-429
• Seiko 5628-510