Seiko Cal. 3817 - 978

Seiko 3817-978

The Seiko 3817-978 represents an important milestone in Seiko's 1977 lineup. Powered by the 3817 caliber with 23j jewels beating at 36,000 bph, it delivers a 48 hours power reserve. [seikata-wm-fd080999e7bd]

Also known as: Bellmatic, Sea Horse

Specifications

Movement
Spring Drive
Case Material
Two-Tone
Case Width
35mm
Case Thickness
9.6mm
Lug Width
19mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
80m
Dial Color
Cream
Jewels
23j
Frequency
36,000 bph
Power Reserve
48 hours
Year
1977

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