Seiko Cal. 3840 - 397

The Seiko 3840-397 represents an important milestone in Seiko's 1980 lineup. With its 19mm lug width and 15.9mm profile, it sits comfortably on most wrists. [seikata-wm-9ab2525ceef5]

Also known as: World Timer

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

36mm

Case Thickness

15.9mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Silver

Jewels

22j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1980

Related Models

• Seiko 3872-125
• Seiko 6391-999
• Seiko 3835-221
• Seiko 6668-444
• Seiko 5234-138
• Seiko 3878-645
• Seiko 7082-449
• Seiko 7073-724
• Seiko 6617-180
• Seiko 6274-301
• Seiko 6124-408
• Seiko 6121-875