It’s d’Yquem – but perhaps not as you know it.
The label states that this bottle was “From the cellars of THE SAVOY HOTEL LONDON”.
The red embossed “1945” on the capsule is correct and the cork is embossed with “LUR SALUCES MIS EN BOUTEILLE AU CHATEAU”.
A rare and unique example of Château d’Yquem.
See more about 1945 d’Yquem at https://ardenfinewines.com/product/chateau-dyquem-sauternes-1945-from-the-savoy-hotel/