Seiko Cal. 6660 - 812

The 6660-812 is a sought-after Solar piece from Seiko's golden era. Powered by the 6660 caliber with 23j jewels beating at 28,800 bph, it delivers a 40 hours power reserve. [seikata-wm-3ec34db205ad]

Also known as: Tuna

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

37mm

Case Thickness

10.1mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

White

Jewels

23j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1970

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