Seiko Cal. 5678 - 677

Seiko 5678-677

The 5678-677 is a sought-after Quartz piece from Seiko's golden era. Powered by the 5678 caliber with 31j jewels beating at 36,000 bph, it delivers a 41 hours power reserve. [seikata-wm-a787e601ef8b]

Also known as: Navigator, Sea Horse

Specifications

Movement
Quartz
Case Material
Hardlex-Coated Steel
Case Width
45mm
Case Thickness
15.6mm
Lug Width
18mm
Crystal
Mineral
Bezel
Inner Rotating
Water Resistance
50m
Dial Color
Green
Jewels
31j
Frequency
36,000 bph
Power Reserve
41 hours
Year
1980

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