The Vintage ATP R2003 Precision Fork Oscillator 400 Cycles is a rare and high-quality component from Western Electric, a trusted brand in vintage electronics. This oscillator unit is designed for precise audio and video applications, offering a frequency of 400 cycles. The ATP R2003 model is a single unit quantity, making it a valuable and sought-after piece for collectors and enthusiasts of vintage audio equipment. With its accurate and dependable performance, this oscillator is sure to enhance the quality of any vintage audio setup.