A California family claims it is owed a $130million stake inCoca-Cola Co after their father bought an antique stock certificate in 2008 for a mere $5. Tony Marohn spent the final year of his life battling the beverage company after tracing the Palmer Union Oil Co certificate to Coca-Cola.

Marohn died in 2010, but his family has taken on the legal battle, saying itis entitled to about 1.8million shares of the soft-drink maker.

Bargain buy Tony Marohn spent the final year of his life battling the beverage company after tracing the Palmer Union Oil Co certificate, pictured, to Coca-Cola

Chris Morosoff, who represents Marohn’s estate, spoke of the patriarch”s 2009 bargain buy.

“It was definitely $5 or less,” said Mr Morosoff.

“This is what he did… One find was a big deal to him.”

Marohn had traced the certificate byway of long-forgotten companies such as Petrocarbon Chemicals Inc and Taylor Wine Co, according to court documents.

But before the family buys that vacation home in Aspen, they”ll have to convince a skeptical Delaware Chancery Court judge that the law is on their side.

“This is a new version of the Beverly Hillbillies,” Judge Leo Strine said at a hearing on January 31, according to a court transcript. He was referring to a 1960s television comedy about a backwoods family that becomes rich by finding oil on their property.

If upheld, Marohn”s estate would become among the largest non-institutional investors in Coca-Cola, according to Reuters data.

“The claim of Mr Marohn”s estate that it is entitled to millions of dollars in Coca-Cola stock – based on a canceled stock certificate for a long-defunct oil company purchased at an estate sale – is meritless and unfair to the Company”s millions of legitimate shareholders,” said a Thursday statement from Coca-Cola.

Bob Kerstein, who runs the scripophily.com website, which researches and sells antique stock certificates, said he gets lots of inquiries from people who want to redeem old certificates.

“We get people who have blank stock certificates and they think they have hit the lotto,” said Kerstein. He said he has to break the news to them they need to be on record with the company as well.

Margules, the Wilmington, Delaware, attorney for Marohn”s estate, said he thinks he can persuade Strine that the law favors his client. Marohn”s certificate was endorsed and assigned, but the transferee was left blank.

Marohn filled in his name and began digging through corporate records. He eventually wrote to Coca-Cola to demand 1.8million shares of common stock for his 1,625 Palmer Union Oil shares.

The company refused, and sued Marohn in Delaware”s Chancery Court in 2009 seeking a declaration he was not entitled to the company”s stock.

Marohn”s estate filed papers last week showing courts have upheld that a person who was issued a stock certificate and then endorsed and assigned it – but left blank the name of the transferee — essentially transformed the certificate into a bearer stock. By writing his name on the stock, Marohn became the legal owner, his estate argued.

Strine said in January he would soon decide how to proceed. He also warned the Marohn estate against pursuing “a drive by of a public company” to extract money to drop the case.

“It”s just not a sport,” Strine said.

The case is In Re Shares of Common Stock of the Coca-Cola Company, Delaware Chancery Court, No 5156.