In order for me to properly assess what you have I will need to know the size and see images of the front, back (do not remove from frame) and a clear, in-focus close-up of the signature/small print.
Please send the photos at your convenience. There is not an extra charge to provide more pictures here.
Thank you for the images. What is the size of the print?
I have not found a match to this for you.
I will opt-out and your question will open again to all the experts. If someone knows the answer they will post a response to you here. You do not need to re-list your question and this does not cost you extra.
I do hope you find the information that you seek.