If Mack kept up on the HP and creature comforts........

The DM’s were introduced around 1966-1967. Just a little after the U’s. They ran till 2005-06.
The RD’s came around 1995 and ran till c2006. They were heavier duty with the regular R cabs and a new squarer CH style hood with the big rectangle headlights.

 

Mack E6: 2005? For which one? The bottom picture is a 2003 dump truck.

the one in the picture frame is a dial a mix cement truck. Not sure what year.

 

All the R model series ended in 2005. I think Mack built a buttload of them at the end of the official production in ‘05 because the dealer in San Antonio still had new ones in stock till almost 2010. The readymix companies around here finally bought them all up by then. Now they are buying heavy duty Petes and KW’s to replace or add to the Macks and a few of the old Ford Louisvilles/Sterlings.

 

Mack e6: I think that one is a 1995