Laboratory Demonstration Model for Electrical Breakdown (Air Spark Discharge) Scientific / Educational Apparatus – Related to Early High-Voltage Experiments Original laboratory demonstration model designed to illustrate electrical breakdown in air (spark discharge phenomenon). The apparatus features a copper and brass electrode assembly with an adjustable pointed discharge electrode mounted on a vertical support. It is housed inside a transparent acrylic case for safe observation. This model demonstrates high-voltage ionization of air and spark formation between electrodes. The working principle is related to early high-voltage experimentation and is conceptually connected to technologies such as spark gap systems and Tesla coil research. While not a complete Tesla coil, the device reflects the same fundamental high-voltage discharge principles explored by Nikola Tesla and other pioneers of electrical science. Materials: Copper, brass, steel, insulating components, acrylic case Condition: Good overall condition with minor signs of age and use. Please refer carefully to the photographs. Use: Educational / scientific demonstration apparatus The piece has a strong industrial scientific aesthetic and is suitable for collectors of technical instruments, physics apparatus, or early electrical experimentation models.