Seiko Cal. 3870 - 361

The Seiko 3870-361 represents an important milestone in Seiko's 1986 lineup. With its 18mm lug width and 10.7mm profile, it sits comfortably on most wrists. [seikata-wm-f22d8abd83b5]

Also known as: Tuna, Sea Horse

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

41mm

Case Thickness

10.7mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Green

Jewels

21j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1986

Related Models

• Seiko 6675-725
• Seiko 6247-103
• Seiko 5620-459
• Seiko 4538-614
• Seiko 6264-230
• Seiko 5257-776
• Seiko 4528-920
• Seiko 5662-265
• Seiko 5236-246
• Seiko 5217-150
• Seiko 5243-758
• Seiko 7165-462