Seiko Cal. 5687 - 991

The Seiko 5687-991 represents an important milestone in Seiko's 1990 lineup. Powered by the 5687 caliber with 22j jewels beating at 36,000 bph, it delivers a 57 hours power reserve. [seikata-wm-48aa87103243]

Also known as: Emperor

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

9.3mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Silver

Jewels

22j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1990

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