Were Mystery Coins from 1901 Heist?

CENTURY AGO. WE TOOK A CLOSER LOOK. >> Reporter: IT MAY BE THE GREATEST BURIED TREASURE EVER FOUND IN THE UNITED STATES. COIN AFTER COIN, MORE THAN 1400. ALL OF THEM PURE GOLD. FOUND BY SOME LUCKY COUPLE ON THEIR CALIFORNIA PROPERTY. ESTIMATED WORTH, $10 MILLION. HOW DID THEY FIND THESE COINS? >> THEY WERE OUT WALKING THEIR DOG ON THEIR PROPERTY LIKE THEY HAD DONE FOR YEARS, AND THEY SPIED SOMETHING METAL AND THEY WENT TO INVESTIGATE. THEY THOUGHT IT WAS FULL OF PAINT. >> Reporter: THE COUPLE WANTS TO REMAIN ANONYMOUS BUT THAT HASN'T STOPPED SOME PEOPLE TRYING TO FIGURE OUT WHO THEY ARE AND HOW THE RICHES WOUND UP ON THEIR PROPERTY? THE LATEST THEORY IS THAT IT'S PART OF AN EARLY 20th CENTURY HEIST AT THE SAN FRANCISCO MINT. THIS NEWSPAPER ARTICLE FROM 1901 MAKES REFERENCE TO THE SUM OF $30,000 IN GOLD COIN STOLEN FROM THE VAULT OF THE CASHIER. THE GOLD WAS NEVER FOUND. IS THIS THE LONG LOST LOOT? IF IT IS, COULD IT ALSO SPELL