Hi Michael,
This engraving is of Robert Dundas 4th Lord Arniston. The dimensions are 18 wide by 22 3/4 top to bottom. The paper is almost like a cloth. I have not seen anything like it. My email is stacy@westcoastshootingsupply.com email me and I will email you pictures of the engraving if you would like. I do not have a true ballpark figure in mind. So, when you see the pictures if you are interested we can go from there.
Thank you. alos, let me know if you have any other questions.