1972 D Half Dollar.dd Or MDd?

I can see what you're referring to but the flat/shelf-like appearance = MD.

Machine Doubling on those devices. Clues?
1. Note that you are always looking on the wrong areas for a doubled die. The spread are located and enlarged on the centers of the devices. On your coin your looking at the outside and inside edges of the devices?
2. The Machine Doubling alters the by removing the contour of the devices. Note on the opposite side of the same devices? Note the edge of the devices has a taper, of a slight angle on the devices. That is called contour. when light hits the top of the devices, the taper creates a lighter area on the top of the devices and as it widens, the lower part gets less light. Thus the contour is in place. On the area you are looking at, that area is pushed aside. Note that side will show a 90 angle at the base of those altered devices. That is the direction the machine moved post strike. This is caused by the machine. A doubled die is has the doubling on the die, not caused by the machine. While a doubled die can have Machine Doubling, Machine Doubling never creates a doubled die. A doubled die is caused by a doubled die.

Note on this DDO for that year, the date is showing a DDO. The mintmark is not showing a RPM. (Which is normal because the mintmarks are added after the die is created in a separate step back then (until 1989). But note the mintmarks are showing the same Machine Doubling that the date is also showing. (Yellow arrows) So the doubled die, was alter post strike, by the machine. So look for the spread on a doubled die, not looking at the outside edges for Machine Doubling:




Sorry, I didn't have a DDR's for that year.

CoopHome: What to look for on a doubled die and why is Machine Doubling not the same as a doubled die? 1972 JFK and 1969-S DDO cent

Looks like MD and a hit.

This it is an DDD, the stars tell you everything.