"We were surprised ourselves by the size of the find," bureau head Kurt Hinteregger said. "That doesn't happen every day." The youths — described by the Austria Press Agency as 15-year-old pupils from Feldkirch in western Austria who were on a school trip — get to keep the money if the rightful owner does not show up within a year.

Even if the owner can claim the money by giving the exact amount and describing the envelope, the finders get to keep 10 percent of the first 2,000 euros and 5 percent of the rest as a reward.