Seiko Cal. 6616 - 181

The Seiko 6616-181 represents an important milestone in Seiko's 1971 lineup. Powered by the 6616 caliber with 25j jewels beating at 36,000 bph, it delivers a 67 hours power reserve. [seikata-wm-b94f1e48f1f1]

Also known as: Sumo, UFO

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

44mm

Case Thickness

15.1mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

200m

Dial Color

Navy

Jewels

25j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1971

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