Seiko Cal. 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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