jtkatec, there are some that are similar to yours, and I think from the same era.. Look at Grand Canyon, Mulberry Rose, and Oriental Glory... They may have similar breeding or background that can lead you to a possible answer. Yours has that purple streak down the center of the falls that these have.
Also check out Historiciris.org
If you go through their pictures, you may find a match..
A full frontal, clearer picture would be helpful in narrowing it down.