Is that a mechanical tach/hour meter from a Mack truck in the knock out hole for the defroster? Seems like a lot of RPMs for a diesel, or is it a duplicate speedo?
“When a long train of abuses and usurpations, pursuing invariably the same Object evinces a design to reduce them under absolute Despotism, IT IS THEIR RIGHT, IT IS THEIR DUTY, TO THROW OFF SUCH GOVERNMENT...” -Declaration of Independence, 1776
Yeah, looking again the last word is not "ROTORS". And yeah, that's a Mack speedo....since it has an ODO. This truck is on Ebay if you want to see more.