The impression of the Consortium phone number, written by Krycek, which Mulder lifted off the empty DAT tape case in "Apocrypha." It says 212-555-1012.
The signature off Alex Krycek's FBI ID. Note that it's signed Alex, not Alexander.
The note Krycek left on the floor of Mulder's apartment as a distraction in "The Red and the Black." It says Things are looking up on the front, Wiekamp Air Force Base on the back.
Kal Romine analyzes Krycek's handwriting! Click here.