I will check to see what I have. Most of my stuff is from 81 82 SS and SRV. I know I have a few tach/speedo units but may not have exact same color scheme. Most of mine have green going to red if I recall. I will post a few pics.
I checked a bunch or early 80's tach's on thé weekend. Unfortunately none or them have the yellow and red idle/normal markings. Found one with the dual scale on the speedo but plain white numbering on black tach.