Scientific Atlanta Model 924-1-3 Demodulators Gain Control Automatic Made in USA. ASSY 524451-001. Serial number 97023008. 
Acquired from government surplus.
Used item, and It is working good. Please check the pictures. If you need more pictures or any test or info, please let me know. Just the unit you are purchasing. No power supply or any other equipment. 
 
                                                         
                                                               IMPORTANT INFORMATION - PLEASE READ  
 
We are not familiar with every item we sell.  Some items may have missing parts or accessories and we do not realize they are missing. Do NOT assume parts or accessories are included.  If they are not in the photos or in the description, then they are not included. Please review the description and photos carefully.  If you are not sure if an item is included, email us BEFORE buying or making an offer. 
 
Please check the picture for details or conditions. 
 
Please ask any questions you may have before buying..
 
The item listed has been used and although in great shape. 
I appreciate you taking the time to stop by my store. If I can be of any assistance, please let me know.