Seiko Cal. 3878 - 980

Seiko 3878-980

The 3878-980 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 3878 caliber with 17j jewels beating at 28,800 bph, it delivers a 41 hours power reserve. [seikata-wm-c64fabd4cb80]

Also known as: Tuna, Baby Tuna

Specifications

Movement
Hand-Winding
Case Material
Two-Tone
Case Width
42mm
Case Thickness
10.7mm
Lug Width
19mm
Crystal
Mineral
Bezel
Rotating
Water Resistance
140m
Dial Color
Navy
Jewels
17j
Frequency
28,800 bph
Power Reserve
41 hours
Year
1986

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seikata-wm-c64fabd4cb80