Seiko Cal. 6610 - 987

This Quartz model from 1974 features a 35mm PVD Black case. Powered by the 6610 caliber with 23j jewels beating at 36,000 bph, it delivers a 42 hours power reserve. [seikata-wm-acb94fdf1c49]

Also known as: Sumo, World Timer

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

35mm

Case Thickness

8.6mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Navy

Jewels

23j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1974

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