Seiko Cal. 3878 - 942

The Seiko 3878-942 represents an important milestone in Seiko's 1987 lineup. Powered by the 3878 caliber with 17j jewels beating at 36,000 bph, it delivers a 70 hours power reserve. [seikata-wm-81407f9ed265]

Also known as: Baby Tuna

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

9.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Burgundy

Jewels

17j

Frequency

36,000 bph

Power Reserve

70 hours

Year

1987

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