Selling as Parts Only. Obtained from a local estate sale of a vintage train collector. These are untested by me. This is exactly as I found them. They are in very clean condition. Along with the instruction sheet.

Vintage electronic assembly, featuring a central integrated circuit (IC) chip, discrete resistors, and capacitors.

Main PCB Components: Includes a central dual-in-line package (DIP) integrated circuit chip surrounded by various analog components like brown disc capacitors, axial resistors, and blue electrolytic capacitors mounted on a brown phenolic paper substrate.

Circuit Function: Based on the layout sheet above it labeled "TRAIN TRONICS Diesel Horn," this main board serves as the core audio tone or sound generator circuit for model railroad sound effects.