Story highlights "It was like opening a book from yesterday," the teen-ager's father said

A wallet, three condoms and some ID papers were found with the remains

(CNN) A 14-year-old Danish boy doing research for a history class found the wreckage of a German World War II plane with the remains of the pilot in the cockpit.

Daniel Kristiansen and his father, Klaus, discovered what's believed to be a Messerschmitt fighter plane buried in a field on their farm near Birkelse in northern Denmark.

"We went out to the field with a metal detector," Klaus Kristiansen told CNN. "I hoped we might find some old plates or something for Daniel to show in school."

Instead, they found bits of plane debris. So they borrowed an excavator from a neighbor and dug down seven or eight meters.

"At first we were digging up a lot of dirt with metal fragments in it. Then we suddenly came across bones and pieces of clothes," Kristiansen said. "It was like opening a book from yesterday."

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