Seiko Cal. 3821 - 518

The Seiko 3821-518 represents an important milestone in Seiko's 1971 lineup. With its 18mm lug width and 12.8mm profile, it sits comfortably on most wrists. [seikata-wm-bd68acaf22a6]

Also known as: Baby Tuna

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

12.8mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Blue Sunburst

Jewels

18j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1971

Related Models

• Seiko 4436-970
• Seiko 6281-147
• Seiko 5698-817
• Seiko 7154-781
• Seiko 6331-133
• Seiko 4444-205
• Seiko 6353-188
• Seiko 6332-681
• Seiko 6340-577
• Seiko 6656-328
• Seiko 6625-407
• Seiko 0745-964