PORTLAND, Maine (AP) -- America's rarest silver dollar -- and possibly its most famous stolen coin -- was discovered in a box filled with miscellaneous coins by a Maine librarian who wasn't even a collector.

The coin, thought to be one of only two 1866 silver dollars minted without the inscription "In God We Trust," is estimated to be worth at least $1 million.

The "No Motto Dollar" was among thousands of coins taken during an armed robbery at a home in Coconut Grove, Forida, in 1967. Most of the best-known coins taken in the unsolved heist have been recovered.

The coin surfaced after American Numismatic Rarities, a coin auction company, received a call from a Maine man who said he thought he had it.