Hi my name is***** you for coming to Just Answer. . I will be glad to help you today. .I have been in the antique business for over 45 years, Appraising, Antique shop owner, also buying and selling on today's current market. it is my pleasure to put my experience to work for you. .
As this is a one of a kind unique item, you will need to have this looked at in person, the signatures would need to be authenticated, and the items inspected, then a value placed on this. I can help you find a list of appraisers in your area if you like?