Seiko Cal. 6660 - 931

The Seiko 6660-931 represents an important milestone in Seiko's 1991 lineup. Powered by the 6660 caliber with 35j jewels beating at 21,600 bph, it delivers a 53 hours power reserve. [seikata-wm-1e34f27f027b]

Also known as: Bullhead

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

46mm

Case Thickness

15.0mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Blue Sunburst

Jewels

35j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1991

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