Your scanner is from the early 70's....by the mid 70's synthesized scanners were being sold....the first one was the Touch 16 by Regency. When Uniden bought most of the company, Relm was formed to continue the business radio side of the company. This organization is now located in Florida. They also sold load management equipment to utilities, and this area became Regency Technologies, and exists at the same basic location as Regency Electronics, at 7707 Records Street, on the east side of Indianapolis.