Belgium 12 gauge sxs

Have an old Belgium made 12 gauge sxs. Gun works good and locks up tight. Has nice engravings on it. Gun is not mint by any means. The stock is a bit worn down and someone has cut into it and added a cheek rest as you can see in the pics. They seem to have done a decent job of it but still unsure as to why they would do that to an original stock. Other than that the gun is in good shape for the age of it. Looking to trade but am open to cash offers. Will add cash on my end if the deal is right. Let me know what you have!