Charles Manson 3 1/2" x 6" photo which has been made into a postcard by Manson's longtime friend Michael Channels aka Backporch Tapes.  Channels has written a note to Manson on the front along with his name and return address. 
In the upper left corner, Charles Manson has written his return address and. hand signed, Charles Manson.

Charles Manson Autographed Barker Ranch Photo Postcard