1967 Proof Centennial Dollar Quintuple Die?

I agree with nickelsguy, looks like some good die vibration.

I would think this is a result of multiple hubbings (doubled die or however many that is) as the doubling appears to be going towards the rim on all lettering, like a Class II doubled die. Which, correct me if I'm wrong, would be impossible to happen during the strike unless the die or the planchet is expanding/contracting spontaneously.

I see the splits, but I have a fairly strong feeling it is nothing more than die vibrations. That does not mean I am not wrong though, Canadian Large Dollars and the large 50 Cent coins are not really my area of expertise by any means, however I have been searching quite a few of them recently and have been passing things like this off as vibrations.

Here are two close ups of the reverse on a 1969 Nickel 50 cent coin for example, first photo is the tip of the Tail, you can see a noticeable split.



and here is a second photo of the bottom stems, as you can see there is a nice amount of splitting similar to the OP's coin which I was fairly convinced was due to vibrations.



The reason as to why I was passing this off as nothing more than a die vibration is due to the Obverse side having a fair amount of Machine Doubling. However, I also know Machine Doubling and Die Deterioration can both be present on genuine hub doubling I am still leaning towards it being vibrations since it is closer to the edge of the coin.