Seiko Cal. 7131 - 820

The Seiko 7131-820 represents an important milestone in Seiko's 1997 lineup. With its 19mm lug width and 14.4mm profile, it sits comfortably on most wrists. [seikata-wm-7cf8dca1ed18]

Also known as: Bellmatic

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

45mm

Case Thickness

14.4mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Burgundy

Jewels

19j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1997

Related Models

• Seiko 0783-538
• Seiko 6239-580
• Seiko 6372-317
• Seiko 4498-541
• Seiko 5660-515
• Seiko 7175-878
• Seiko 4471-924
• Seiko 6667-727
• Seiko 6391-425
• Seiko 3851-897
• Seiko 6674-378
• Seiko 6624-906