This is the original mat. I wanted to point out the orangey color of the bevel. This is the number one indicator that the mat is not acid free. In fact, the orangeness is caused by acid oxidation. Also, there is discoloration on the outside edges of the mat, which was under the rabbet of the frame. This is an indication that there was no uv protective glazing on this mat in its original setting. I mention this not because the original framing was inferior (quite the contrary! The art was mounted using very proper techniques and the frame itself is magnificent and very high quality.), but because this was originally framed before acid free products and uv glazing was invented. It is a really good idea to change old or inferior mats and glass to more modern conservation materials before irreparable harm comes to valuable art.
|Virgin of the Adoption|
|Study for Vicomtesse d'Hausonville, born Louise Albertine de Broglie|
So now you have all the clues that I have. Who knows? I may have just handled the real deal.