Mailing envelope, 6.5 x 3.75, with “Arm For Defense” printed along the bottom and a small military cachet in the top left corner, signed on the front in black ink, “A. Einstein, I. 1942”; and a felt tip signature, “Charles Chaplin,” on an off-white 4.5 x 3.5 gold bordered collector’s card. Accompanied by a glossy 10 x 8 photo of Chaplin and Einstein in tuxedos at the world premiere of Chaplin’s film City Lights. Einstein was Chaplin’s personally invited guest to the January 30, 1931, world premiere. In fine condition, with neatly penned notations along top and bottom edge and a date of 1967 to card and a trivial brush to first name of Chaplin’s signature. COA John Reznikoff/PSA/DNA and R&R COA.