Seiko Cal. 5666 - 887

The Seiko 5666-887 represents an important milestone in Seiko's 1978 lineup. Powered by the 5666 caliber with 27j jewels beating at 28,800 bph, it delivers a 47 hours power reserve. [seikata-wm-a3c7a1b5125d]

Also known as: Sumo, Shogun

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

11.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

120m

Dial Color

Black

Jewels

27j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1978

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