Seiko Cal. 6661 - 845

The 6661-845 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6661 caliber with 27j jewels beating at 21,600 bph, it delivers a 61 hours power reserve. [seikata-wm-e221a4a191f5]

Also known as: Bullhead, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

42mm

Case Thickness

15.2mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Green

Jewels

27j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1971

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