Seiko Cal. 6610 - 187

The Seiko 6610-187 represents an important milestone in Seiko's 1973 lineup. Powered by the 6610 caliber with 18j jewels beating at 28,800 bph, it delivers a 50 hours power reserve. [seikata-wm-5158ea13622f]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

10.4mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Green

Jewels

18j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1973

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