The old time collectors took the matches out one telling me he collected match book covers not matches .Most newer collectors like them with the matches . My self if there are matches missing i remove the rest removing the staple carefully . The matches you show are back strike matches most collectors like the front strike which are older .Front strike started during the 1960's . That said however lots of the newer casinos weren't around during the front strike era so if your collecting all of the casinos you will need to add back strike matches to your group .