Top one is correct. Sweep pattern is different for 68 and up. And originals only go to 6k.
There are some that are 70 specific but it's based on font size and minor color changes I believe.
That was my thoughts as well. But I gotta tell you the 8k tach looks as OEM as it gets. It's literally been in my car for 20 years, well before any repro stuff came along.