Seiko Cal. 3878 - 730

Seiko 3878-730

The Seiko 3878-730 represents an important milestone in Seiko's 1969 lineup. Powered by the 3878 caliber with 33j jewels beating at 36,000 bph, it delivers a 41 hours power reserve. [seikata-wm-8c9c65dc1c77]

Also known as: Sumo, UFO

Specifications

Movement
Hand-Winding
Case Material
PVD Black
Case Width
38mm
Case Thickness
14.5mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
170m
Dial Color
Black
Jewels
33j
Frequency
36,000 bph
Power Reserve
41 hours
Year
1969

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seikata-wm-8c9c65dc1c77