1964 D Quarter Is It RPM

Still looks mechanical, but remember, I'm not the expert here.

What's interesting is that I have several 1964-D coins that look just like this. I haven't seen any years other than the 1964-D with that type of Mechanical Doubling.

4fun, Machine Doubling was hard for me and my 54 yr old eyes. I have just purchased a nice scope and have gone thru a few thousands Lincolns since and have studied the difference between doubled die strikes and Machine Doubling. I am still learning but am much better at recognizing the difference, now. If you get the chance, spend sometime looking at them up real close, it will make a huge difference.
Jim

Firecom, that's a leaf with damage.

I don't believe so. The leaves are too weak.

Besides, 'B' is only for 1964-P.

To Clarify.

Type B has been found only on 1956 - 1964 Philadelphia minted quarters.
Type B is easiest to see by looking for a wider space between the E and S of States.
Type B has not been found on any Denver minted quarters (to my knowledge)
Type B refers to a modification of proof dies intended to be used from 1936 - 1964 and again from 1968 to 1972.

Type C is on 1964-D quarters not 1964 as suggested. Perhaps the poster simply omitted the Mintmark. These have stronger tail feathers as well as differences in the strength of the leaves.

Type C was also used on some 1968 S proof coins and then all proof quarters from 1973 through 1998

Type C is really the use of a die prepared for production of 1965 Clad quarters. One die accidentally got shipped to Denver and had a mintmark added and that one die produced the 1964-D Type C quarters.