Folks, Item number: 110386400699 is listed as: Aviation Aircraft Vintage Dual Audio Control Indicator It looks like it fits in an instrument panel in the place of a large instrument such as an altimeter. I wonder what system it came from? Roy Roy Morgan k1lky at earthlink.net 529 Cobb St. Groton NY, 13073 Home: 607-898-3607 Cell: 301-927-7794