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ETA Mechanical movements Caliber Product Line Winding Diameter ... 1080 (manual wind, sweep-second, 17/19/21 jewels, 18000vph, reserve 42h) See also.
A fusee (from the French fusée, wire wound around a spindle) is a cone-shaped pulley with a helical groove around it, wound with a cord or chain attached to the mainspring barrel of antique mechanical watches and clocks. It was used from the 15th century to the early 20th century to improve timekeeping by equalizing the uneven pull of the ...
The hand-winding movement of a Russian watch. A mechanical watch is a watch that uses a clockwork mechanism to measure the passage of time, as opposed to quartz watches which function using the vibration modes of a piezoelectric quartz tuning fork, or radio watches, which are quartz watches synchronized to an atomic clock via radio waves.
Mechanical movements get dirty and the lubricants dry up, so they must periodically be disassembled, cleaned, and lubricated. One source recommends servicing intervals of: 3–5 years for watches, 15–20 years for grandfather clocks , 10–15 years for wall or mantel clocks , 15–20 years for anniversary clocks , and 7 years for cuckoo clocks ...
Rock and roll luminary Elvis Presley owned a 14k gold Universal Genève dress watch which he gifted to his personal doctor in Las Vegas in the 1970s. [ 33 ] English rock musician Eric Clapton donned a 'panda dial' Tri-Compax during his years with the rock band Cream in the mid to late 1960s, leading to this particular model being nicknamed the ...
Ruby jewel bearings used for a balance wheel in a mechanical watch movement Cross-section of a jewel bearing in a mechanical watch. This type of donut-shaped bearing (red) is called a hole jewel, used for most of the ordinary wheels in the gear train. It is usually made of synthetic sapphire or ruby, press-fit into a hole in the movement's ...