Can anyone help identify this mystery integrated circuit?

Most likely a resistor network. This would be an uncommon color for an integrated circuit. CTS doesn't presently make integrated circuits, but they still make resistor networks. I can't decode the part number but their numbering system could have changed in 50 years.

7118 is the date code. It was manufactured in the 18th week of 1971.

https://www.ctscorp.com/connect_product_line/resistor-networks-rc-terminations/

I remember using that series of thick (or thin) film on ceramic resistor networks in the 80s. IIRC, the 016 may have indicated the network layout which was typically 7 series resistors or 13 parallel resistors with pin 14 common. The 824 may be the resistor code for 820k. I can't recall what the 001 indicated.