Seiko Cal. 5660 - 166

The Seiko 5660-166 represents an important milestone in Seiko's 1966 lineup. Powered by the 5660 caliber with 27j jewels beating at 36,000 bph, it delivers a 72 hours power reserve. [seikata-wm-848faa8ecb3d]

Also known as: Bellmatic

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

14.7mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Champagne

Jewels

27j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1966

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