Seiko Cal. 6661 - 937

The 6661-937 is a sought-after Quartz piece from Seiko's golden era. Powered by the 6661 caliber with 27j jewels beating at 21,600 bph, it delivers a 56 hours power reserve. [seikata-wm-bb42203f7e0e]

Also known as: Bullhead

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

43mm

Case Thickness

11.8mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Black

Jewels

27j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1988

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