Seiko Cal. 7166 - 521

The 7166-521 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 7166 caliber with 23j jewels beating at 36,000 bph, it delivers a 64 hours power reserve. [seikata-wm-7330bb39ef06]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

13.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

170m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1995

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