Here is a small collection of Escort Twin Cam / RS1600  ads.

Australian Escort Twin Cam ad, Modern Motor, July 1972:

Australian Escort Twin Cam ad, circa 1970-71:

UK  Escort Twin Cam ad, circa 1968:

UK  Escort Twin Cam ad, circa 1968:

AVO Owner's Club magazine ("HAVOC") November/December 2000: