Seiko Cal. 6670 - 660

The 6670-660 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6670 caliber with 27j jewels beating at 21,600 bph, it delivers a 42 hours power reserve. [seikata-wm-c8cb874d7d12]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

40mm

Case Thickness

15.9mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Silver

Jewels

27j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1976

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