Puzzled by Tybbe master

"PUZZLED" Cool effect where the spectator chooses a card and signs it
Then the card is lost in the deck
and then we take something cool in our pocket
Which is piece a symbol,
And when we look for the spectator's card
It turned out that one card among the others had a hole in it
And when the card was opened it was the spectator's selected card with the sign,
And when the piece of symbol was placed
it was fit because it's part of the spectator's card, and it really matched...!!
Very cool and practical effect...
LEARN NOW...!!!