My understanding is that the assembly line clusters have the chrome plastic ring around the speedo and tach as per the photos I had attached. I've owned my KR since 1981 and had installed a Ford replacement bezel in the late 80's in my car and it had the speedo and tach all black. In addition, the Ford replacements had black border around the high-beam indicator light. These were the reason I had my original cluster restored by Orlando Mustang, as they restore to assembly line standards. Very happy with the results.
Don
gt350bp