Seiko Cal. 5611 - 687

The Seiko 5611-687 represents an important milestone in Seiko's 1987 lineup. Powered by the 5611 caliber with 18j jewels beating at 36,000 bph, it delivers a 38 hours power reserve. [seikata-wm-be10f83906c7]

Also known as: Helmet

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

41mm

Case Thickness

14.1mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Cream

Jewels

18j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1987

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