Seiko Cal. 3820 - 791

The 3820-791 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3820 caliber with 34j jewels beating at 28,800 bph, it delivers a 39 hours power reserve. [seikata-wm-cc34f7f2864f]

Also known as: Goldfeather, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

11.4mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

34j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1991

Related Models

• Seiko 4427-707
• Seiko 6274-991
• Seiko 7099-772
• Seiko 6134-331
• Seiko 6241-273
• Seiko 6328-802
• Seiko 5268-477
• Seiko 5231-515
• Seiko 6221-886
• Seiko 6136-633
• Seiko 5299-359
• Seiko 6671-162