I recently found an old Altec unit when cleaning out a storage building at church. The model numbers are 1567A and 1569A. They are both housed in the same green case. As far as I can tell some of the tubes are burned out so I have not been able to see if it still works. It appears to be in fairly good condition. Does anyone know what a unit like this is worth and would it be worth restoring. Thank you for your input.