Glad to see the fruit and rooster arrived safely at your place :-) Thank you for posting!I'm surprised by the postmark. Not only because the colouring-pencil apple was cancelled, but because it was canceled in Rotterdam instead of the most close city Amsterdam. Rotterdam is known as a harbour city, but probably mail also travels via Rotterdam airport instead of the main airport of Amsterdam.
I just thought that you posted it close to Rotterdam... another mini mail mystery that well never be solved! Thanks again, great mail art.