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2. Zenith (watchmaker) - Wikipedia

   en.wikipedia.org/wiki/Zenith_(watchmaker)

   Zenith's El Primero movement was used by Rolex from 1988 to 2000 for the Rolex Daytona chronograph. The El Primero movement's high rate allows a resolution of 1 ⁄ 10 of a second and a potential for greater positional accuracy over the more common standard frequency of 28,800 vibrations per hour (4 Hz). [ 10 ]

3. Zenith Just Dropped a New 50th Anniversary Retro El Primero Model

   www.aol.com/news/zenith-just-dropped-50th...

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4. El Primero - Wikipedia

   en.wikipedia.org/wiki/El_Primero

   El Primero (constructed in San Francisco, California) was the first steam yacht built on the west coast of the United States. The yacht had an auxiliary sail rig. The steam engine was rated at 225 indicated horsepower, driving the vessel at a maximum speed of 13.5 knots.

5. Zenit (camera) - Wikipedia

   en.wikipedia.org/wiki/Zenit_(camera)

   Zenit 122 Zenit-4 with leaf shutter Zenit-16 with vertical travel shutter. The first attempt to make high-end professional camera by KMZ was the Start in 1958. This camera had a full set of shutter speeds (from 1 sec to 1/1000), a lens with an automatic diaphragm in a unique breech-lock mount, and even a knife for cutting-off part of the unexposed film.

6. Trans-Oceanic - Wikipedia

   en.wikipedia.org/wiki/Trans-Oceanic

   Zenith Trans-Oceanic Vacuum Tube Radio, Model G-500, circa 1949. The 8G005Y was replaced in December 1949 by the G500—a 'changeover' model that had updated electronics using miniature tubes but the same appearance. The G500 held its price at less than $100 until it was withdrawn in mid-1951. Total production for the G500 was 90,000.

7. Zenith SupersPort - Wikipedia

   en.wikipedia.org/wiki/Zenith_SupersPort

   The SupersPort is a line of PC-compatible laptops manufactured by Zenith Data Systems and sold from 1988 to 1993. The first two main entries in the SupersPort line included either an Intel 80286 microprocessor clocked at 12 MHz or an 8088 processor clocked at 8 or 4.77 MHz, switchable.