Replacement Tach

I'm not so worried about being incorrect. My issue is the stock tach even after being calibrated is so sloooooow it was useless. So I put in an autometer. But I'd rather have an operational tach where its nice and easy to see and fill the hole in the dash at the same time.

Does anyone know who makes the movememnt for them and aside from the larger scale how close the lettering is? Just curious how accurate it is.