Seiko Cal. 6660 - 957

The 6660-957 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6660 caliber with 17j jewels beating at 36,000 bph, it delivers a 42 hours power reserve. [seikata-wm-c035cea6df5e]

Also known as: Monster, Rally

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

12.0mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

120m

Dial Color

Navy

Jewels

17j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1996

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