This is a 1946 posted envelope,no inner contents. The front has an address,cancellation stamps and a cancelled 1 1/2 cent Martha Washington stamp. The back has a Bethesda Sanatorium stamp on the envelope cover. It also has a cancellation stamp across the back of the top envelope.
CVL&S762

"International buyers ? please note: Import duties, taxes, and charges aren't included in the item price or postage cost. These charges are the buyer's responsibility.

"Please check with your country's customs office to determine what these additional costs will be, prior to bidding or buying."