A rare collection of high-precision analog semiconductors. Includes the highly sought-after National Semiconductor DAC1020 with Gold Lids and ceramic bodies. Also includes Analog Devices AD7541 12-bit DACs and PMI OP11 precision op-amps, both staples of high-end vintage audio and instrumentation. All parts are verified New Old Stock and have been fully tested working. Perfect for high-fidelity audio restoration or aerospace-grade electronics projects.