Seiko Cal. 6660 - 120

The 6660-120 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6660 caliber with 28j jewels beating at 28,800 bph, it delivers a 54 hours power reserve. [seikata-wm-bfbcbec8cd7d]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

38mm

Case Thickness

15.5mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Green

Jewels

28j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1976

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