Seiko Cal. 3878 - 701

Seiko 3878-701

The 3878-701 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3878 caliber with 28j jewels beating at 28,800 bph, it delivers a 64 hours power reserve. [seikata-wm-25429856ca00]

Also known as: Monster, Sea Horse

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
38mm
Case Thickness
11.5mm
Lug Width
18mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
70m
Dial Color
Silver
Jewels
28j
Frequency
28,800 bph
Power Reserve
64 hours
Year
1979

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seikata-wm-25429856ca00