How Old Is My Crown Royal?

[flatbedjon]

I just purchased a Crown Royal that is very different from the other vintage bottles I have. It is missing 3 things.....the date stamp on the Tax Seal, the Proof and it does not have "Blended Canadian Whisky" on the label. I have Canadian Whisky's that date back to the 30's and they all have those 3 things. Does anybody have any idea of how old this might be?