Seiko Cal. 3878 - 365

Seiko 3878-365

The 3878-365 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 3878 caliber with 28j jewels beating at 36,000 bph, it delivers a 49 hours power reserve. [seikata-wm-29d85bb13072]

Also known as: Tuna, Arnie

Specifications

Movement
Hand-Winding
Case Material
Stainless Steel
Case Width
46mm
Case Thickness
8.8mm
Lug Width
18mm
Crystal
Mineral
Bezel
Fixed
Water Resistance
80m
Dial Color
Black
Jewels
28j
Frequency
36,000 bph
Power Reserve
49 hours
Year
1983

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