This is an old sound recording machine called the Edison Cylinder Phonograph, one of the earliest devices in the history of sound recording and playback. 🔎 What do you see in the pictures? * Wooden box: Contains the entire mechanism and serves as a protective case. * Metal arm (needle): Reads or records sound. * Black/blue cylinder: These are the "cylinders" on which sound is stored. * Lower drawers: For storing a large number of cylinders, each with a number or name. How does it work? It relies on a simple yet ingenious idea: 1. The cylinder is rotated (manually or by a motor). 2. The needle touches the surface of the cylinder. 3. If the cylinder has sound recorded on it: * The needle vibrates according to the etched grooves. * The vibrations are converted into audible sound through a horn (often not visible here, it was usually attached). 4. If you want to record: * You speak into the horn. * The sound vibrates the needle, which "engraves" the oscillations onto the cylinder. 🕰 Who invented it? Invented by scientist Thomas Edison in the late 19th century (around 1877), it was a true revolution because it was the first time sound could be preserved and replayed. 💡 Important Notes * These devices were used for listening to music or recording voice messages. * The cylinders were often made of wax or similar materials. * Today, it is considered a valuable antique for collectors. Price is at the highest offer, starting bid 2000 SAR.