Seiko Cal. 3831 - 431

This Automatic model from 1998 features a 37mm PVD Black case. With its 21mm lug width and 12.1mm profile, it sits comfortably on most wrists. [seikata-wm-df866ef8650d]

Also known as: Tuna, Emperor

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

37mm

Case Thickness

12.1mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Blue Sunburst

Jewels

26j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1998

Related Models

• Seiko 5246-417
• Seiko 6321-822
• Seiko 5671-497
• Seiko 6641-171
• Seiko 6261-923
• Seiko 5243-134
• Seiko 7162-657
• Seiko 5688-728
• Seiko 6285-421
• Seiko 4498-930
• Seiko 5671-885
• Seiko 6356-270