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Pulsar P4 Time Computer with LED display ref. 3215-2 mens stainless steel watch circa 1975 Made in the USA A Pulsar LED watch from 1976. In 1970, Pulsar was a brand of the American Hamilton Watch Company which first announced that it was making and bringing the LED watch to market. It was developed jointly by American companies Hamilton and ...
204.901 (small 8.75 lignes used primarily in women's watches) 204.911 (replacement for the 204.901 upgrading from a capacitor to a rechargeable battery) 205.111 (discontinued and replaced by the 205.911 which upgraded from a capacitor to a rechargeable battery) 205.711 (15 jeweled movement used only by Swatch Watch for a variety of its fashion ...
A Battery: Eveready 742: 1.5 V: Metal tabs H: 101.6 L: 63.5 W: 63.5 Used to provide power to the filament of a vacuum tube. B Battery: Eveready 762-S: 45 V: Threaded posts H: 146 L: 104.8 W: 63.5 Used to supply plate voltage in vintage vacuum tube equipment. Origin of the term B+ for plate voltage power supplies.
This list is a duplicate of Category:Watch brands, which will likely be more up-to-date and complete. Manufacturers that are named after the founder are sorted by surname. Manufacturers that are named after the founder are sorted by surname.
Button, coin, or watch cells. A button cell, watch battery, or coin battery is a small battery made of a single electrochemical cell and shaped as a squat cylinder typically 5 to 25 mm (0.197 to 0.984 in) in diameter and 1 to 6 mm (0.039 to 0.236 in) high – resembling a button.
The first digital watch was the Pulsar, introduced by the Hamilton Watch Company in 1972. The "Pulsar" became a brand name, and would later be acquired by Seiko in 1978. In 1982, a Pulsar watch (NL C01) was released which could store 24 digits, likely making it the first watch with user-programmable memory, or the first "memorybank" watch.
This page was last edited on 12 July 2007, at 13:56 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may ...
The first digital electronic watch, a Pulsar LED prototype in 1970, was developed jointly by Hamilton Watch Company and Electro-Data, founded by George H. Thiess. [72] John Bergey, the head of Hamilton's Pulsar division, said that he was inspired to make a digital timepiece by the then-futuristic digital clock that Hamilton themselves made for ...
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