Seiko Cal. 6660 - 525

The Seiko 6660-525 represents an important milestone in Seiko's 1987 lineup. Powered by the 6660 caliber with 35j jewels beating at 28,800 bph, it delivers a 36 hours power reserve. [seikata-wm-559ce322621e]

Also known as: Bullhead, Helmet

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

41mm

Case Thickness

13.7mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Green

Jewels

35j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1987

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