So my dad has this in his collection labeled as "1964 P 1965 RV" which I know is wrong because it's obviously a D mint mark, lol. As for a Type C? No idea, it has some circulation wear and I'm absolutely worthless at identifying varieties anyway, lol. The leaf detail is maybe a little better than the 1964 RV and the alignment over the A in DOLLAR looks right. The ES of STATES looks more like a Type A to me though. All I really know is it's definitely not a Type B.
The 1964-D Type C reverse WAS struck with the clad reverse die of 1965. At that time the mint marks were punched in after the die was made. One of the telltale signs is that the leaf touches the "A" of "DOLLAR", which your photo does in fact show. Home Page - 1956-1964 Type-B Reverse Washington Quarters (webs.com)
It looks like a type B reverse to me. The leaves under the tail feathers have rounded tops as opposed to pointed tops on the type C. Also type C has distinct centre lines to the tail feathers where the OP coin does not. JMHO
It’s not a Type B either. Just a regular worn 1964 D Type A Rev from what I see. I will share some pics of both varieties when I get home later today.
Okay, just getting home (with access to my image files.) Here are some images of Type C (Rev of 1965) reverses. Remember, these were created to accommodate for the hardness of the Cu-Ni clad metal composition, so they're going to be lower relief (flatter) in general, but with more distinctly defined edges around the shape of the leaves. It's pretty clear even on worn examples once you've seen a few.
And here are some images of Type B reverses (repurposed proof dies) - I've always wondered why lots of sites that show images of these point to almost every diagnostic except the most obvious one: the eagle's left (viewer's right) wingtip. It's something that stands out even on really worn examples (actually, especially on worn examples, because it starts to have a circulated cameo effect.) I was having trouble discerning the difference until someone over at the NGC boards, I believe, told me that was usually the easiest way to diagnose them (especially with online pictures.)
Thanks for your help! All I could really tell was it wasn't a Type B because you could see the tips of the upper arrows the eagle is clutching. Like I said, I'm horrible at varieties, lol. At least it's still silver, lol Thanks again for your help everyone!