Seiko Cal. 3878 - 390

The Seiko 3878-390 represents an important milestone in Seiko's 1966 lineup. The Rotating bezel and 34mm case give it a distinctive presence on the wrist. [seikata-wm-153dbc9ee11c]

Also known as: Baby Tuna

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

34mm

Case Thickness

10.1mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

130m

Dial Color

Green

Jewels

21j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1966

Related Models

• Seiko 5653-492
• Seiko 3894-348
• Seiko 6263-977
• Seiko 6318-418
• Seiko 7122-490
• Seiko 5648-674
• Seiko 4474-760
• Seiko 4438-719
• Seiko 5264-706
• Seiko 3826-865
• Seiko 4571-475
• Seiko 5273-114