Seiko Cal. 6660 - 100

The Seiko 6660-100 represents an important milestone in Seiko's 1975 lineup. Powered by the 6660 caliber with 23j jewels beating at 28,800 bph, it delivers a 56 hours power reserve. [seikata-wm-26fce918f9df]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

8.3mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1975

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