Seiko Cal. 3870 - 138

The Seiko 3870-138 represents an important milestone in Seiko's 1981 lineup. With its 18mm lug width and 12.5mm profile, it sits comfortably on most wrists. [seikata-wm-2184f2506366]

Also known as: Shogun, Bellmatic

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

42mm

Case Thickness

12.5mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

34j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1981

Related Models

• Seiko 7168-152
• Seiko 7161-469
• Seiko 7167-732
• Seiko 4454-454
• Seiko 7055-766
• Seiko 4579-294
• Seiko 6182-479
• Seiko 6382-114
• Seiko 4414-195
• Seiko 5611-851
• Seiko 7129-219
• Seiko 5279-635