Seiko Cal. 6690 - 371

The 6690-371 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6690 caliber with 36j jewels beating at 36,000 bph, it delivers a 64 hours power reserve. [seikata-wm-f32e72cee564]

Also known as: Bullhead, Emperor

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

39mm

Case Thickness

11.9mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Cream

Jewels

36j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1976

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