Here is an answer by the seller of the rifle from GB. Is is a custom rifle maker with a fantastic reputation. I asked him if he restored the rifle, his response.
"To specifically answer your question: no, I did not restore this rifle. In fact, I did not even shoot it. I sold this rifle in the condition in which I received it. Looking back at the description I wrote: "A dovetail insert that perfectly compliments the front sight fills the space vacated by the original rear sight, which was replaced by a Lyman 1A aperture sight installed on the rear tang." indicating that- at the very least- there were changes made to the sighting from its original configuration. Hence, I did not describe the rifle "in original condition". I described the rifle as accurately as possible with no intent to mislead. If, in fact, it was refinished I would say the work done was of world-class quality and not done here in the States. But that is my professional opinion. I agree that if the gun was restored, someone with a great amount of skill performed the work.
You have a remarkable, beautiful, rare and desirable rifle, one that most anyone would be delighted to own. I hope any detractors on the internet forums do not diminish the joy you have in owning such an amazing and unique rifle. I have not heard back from its previous owner regarding what he knows of its history. He is an international business consultant and currently traveling abroad. He did indicate he would contact me upon his return and I will gladly pass on what information he shares. I will be in touch."