There is one image of the signature "Ferguson" attached here.
In order for me to properly assess what you have I will need to know the size and see images of the front and back (do not remove from frame).
Please send the photos at your convenience. There is not an extra charge to provide more pictures here.
I am wondering if you are still interested in having your item assessed?
Please let me know and do you have requested images available?
I look forward to reading back from you.