An Encounter

Walking the streets of Berlin I came across this interestingly dressed fellow.
"Hey, I like your outfit," I said."Thank you sir, I just arrived here. I find yours interesting, too.""Would you mind me taking your photograph?""No, not at all, please take one," the man said in a strange accent.So I took a picture and out of my enthusiasm I had this idea of how to return the favor."If you like I can send you a print of your photo."The man smirked. Seeing him smirking like that I came to the conclusion that he wouldn't believe me."I'm serious," I said. "You give me your address and I'll send you a print."The man looked at me smirking even more: "It's not that I don't believe you. In fact I know you will."Then he reached in his pocket and pulled out something. He showed it to me. It was a photograph. It was the exact same photograph of him standing there. It was the one I just took. It was a hundred years old.