Seiko Cal. 5687 - 278

The Seiko 5687-278 represents an important milestone in Seiko's 1970 lineup. Powered by the 5687 caliber with 19j jewels beating at 28,800 bph, it delivers a 42 hours power reserve. [seikata-wm-0b58c2831f67]

Also known as: Emperor, Arnie

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

34mm

Case Thickness

9.1mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

90m

Dial Color

Green

Jewels

19j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1970

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