Robert Oppenheimer Authentic 3.5x6 1963 Envelope Handwriting Sample BAS Slabbed

This 3.5x6 Envelope Handwriting Sample Postmarked December 27, 1963 has been Personally written by Robert Oppenheimer. This item is 100% Authentic, it comes slabbed and authenticated by Beckett Authentication Services. The authenticity can be verified on Beckett Authentication Services website. Please note, this is not signed by Robert Opeenheimer, but is filled out in his hand.