Seiko Cal. 6690 - 198

The 6690-198 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6690 caliber with 31j jewels beating at 28,800 bph, it delivers a 50 hours power reserve. [seikata-wm-4ec445804b5e]

Also known as: Tuna, Emperor

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

40mm

Case Thickness

8.8mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Black

Jewels

31j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1973

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