Professional Coin Grading Service (www.PCGS.com) has authenticated the first known 1868/6 overdate Australian sovereign.

The historic gold coin depicting a young Queen Victoria recently was submitted by a sharp-eyed professional numismatist on the Australian island state of Tasmania, and it nowis certified PCGS AU58+.

"The sovereigns from 1855 to 1870 are among the most important and valuable series in Australian numismatics. These were the first coins struck by the Royal Mint in Sydney thatwas established in 1855 as the first branch of the British Royal Mint," said Scott Thompson, PCGS World Coin Department Manager.

"These sovereigns have a distinctive 'Sydney Mint' reverse. This is the only time the Royal Mint permitted a design unique to a branch mint," explained Thompson.

John Haddad, Managing Director of Tasmanian Numismatics in Moonah, Tasmania, recently submitted the coin to PCGS. He obtained it six months earlier from England, and when PCGSconfirmed it is a previously unknown overdate Haddad said he "was filled with joy, so happy, fist pumping and over the moon!"

"I have a keen eye for varieties and I enjoy finding and studying them. This particular coin was advertised at the time as being an 1868/6 overdate, although it was notformally recognized as such. I was skeptical at first but after enlarging images of the coin I could clearly see the overdate. I had to have it with intentions of having thisvariety authenticated by PCGS," Haddad explained.

"Since obtaining the coin I have researched images for this variety from past sales going back 30 years and have not seen another. There may be others out there but as I havenot seen another, it may be the only example in existence," he stated.

The coin has been consigned to Heritage Auctions and it will be offered on January 6, 2019 in their New York International Numismatic Convention World Coins SignatureAuction.

How did the overdate occur at the Sydney Mint?

"Logistically, getting supplies and skilled labor was challenging for the branch mints in the 1800s. Reworking dies and creating overdates was a practical solution forgetting around the difficulty of obtaining new dies from the Royal Mint in England. Only a handful of overdates in the Australia sovereign series are known, and of those seen inperson by PCGS experts, this 1868/6 is the most pronounced with a good portion of the 6 still visible underneath the 8," said Thompson.

Other overdate examples of the Australian Reverse sovereigns PCGS has graded are: 1861/0, 1865/4, 1865 6/5. There are some other combinations listed in numismatic publications,but not yet confirmed by PCGS.

"In a series that is already rare, these overdates are in a category all their own. Many examples known today are unique, such as the 1868/6," Thompson stated.