Seiko Cal. 3878 - 121

Seiko 3878-121

The 3878-121 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 3878 caliber with 35j jewels beating at 36,000 bph, it delivers a 44 hours power reserve. [seikata-wm-ca59bcdfc83b]

Also known as: Navigator, Golden Tuna

Specifications

Movement
Hand-Winding
Case Material
PVD Black
Case Width
34mm
Case Thickness
14.6mm
Lug Width
18mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
170m
Dial Color
White
Jewels
35j
Frequency
36,000 bph
Power Reserve
44 hours
Year
1965

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