Seiko Cal. 3878 - 940

The Seiko 3878-940 represents an important milestone in Seiko's 1980 lineup. Powered by the 3878 caliber with 28j jewels beating at 36,000 bph, it delivers a 71 hours power reserve. [seikata-wm-3b11e1072e4d]

Also known as: Shogun, Navigator

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

44mm

Case Thickness

9.4mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Cream

Jewels

28j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1980

Related Models

• Seiko 3870-512
• Seiko 5216-841
• Seiko 5610-248
• Seiko 5690-422
• Seiko 6178-875
• Seiko 4411-699
• Seiko 6346-897
• Seiko 7122-209
• Seiko 3817-676
• Seiko 4421-614
• Seiko 6233-135
• Seiko 4595-545