Authenticated Ticket Stub from the game which culminated in The Immaculate Reception, voted the Greatest Play in NFL History.

1972 AFC Playoff - Steelers (13) Vs. Raiders (7)

Steelers fullback, Franco Harris caught a deflected pass just before it could hit the ground and ran for a game-winning touchdown.

This ticket has been authenticated and graded by PSA as 1.5 Fair.  It is encapsulated with details labeled.

I have added a third picture showing the ticket stub prior to being graded by PSA.