Seiko Cal. 3878 - 942

Seiko 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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