Seiko Cal. 3870 - 390

The Seiko 3870-390 represents an important milestone in Seiko's 1988 lineup. It features a Green dial protected by a Acrylic crystal and offers 170m of water resistance. [seikata-wm-feaee809fad5]

Also known as: Helmet, Navigator

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

34mm

Case Thickness

14.8mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

170m

Dial Color

Green

Jewels

17j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1988

Related Models

• Seiko 5644-620
• Seiko 4559-505
• Seiko 7124-671
• Seiko 5251-512
• Seiko 0719-647
• Seiko 4539-436
• Seiko 4596-353
• Seiko 4528-597
• Seiko 4570-600
• Seiko 5641-483
• Seiko 6397-615
• Seiko 7145-804