Rare dealer tach, Can anybody give me more info?

[Mr. Chevy]

This particular one I believe is 1970 or early 70s vintage with the pebble grain top and GM logo. This tach sold tonight on e-bay for $150.00. Looks like the area where the numbers are was fadded from the sun. I have one that is mid to late 60s vintage that has a smooth, plastic top and Chevy bowtie logo embossed in the plastic. I bought it NOS on e-bay over this past winter still in the box. I am putting it in my car this year. These are really cool pieces that you do not see too often in cars.