Seiko Cal. 6660 - 378

The 6660-378 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6660 caliber with 19j jewels beating at 36,000 bph, it delivers a 57 hours power reserve. [seikata-wm-0e055d4f06fd]

Also known as: Golden Tuna

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

38mm

Case Thickness

10.2mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Cream

Jewels

19j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1973

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