A collection of Hawaiian coins and currency are being mooted as the 'most extensive presentation ever to appear at auction or elsewhere in the history of American numismatics.'

This is according to the press release issued by numismatists and auctioneers from both Ira & Larry Goldberg, Beverly Hills, and Stack's in New York City who are collaborating for the auction.

The collection belongs to a Hawaii man, who reportedly wishes to remain anonymous. It features 26 pages of coins and 30 pages of currency and other notes.

Collectors are expected spend an incredible estimated $1-2m when the coins go under the hammer, according to local newspaper the Honolulu Star Bulletin.

The extensive and rare collection includes 1-c, 5-c, 10-c, eighth-dollar, quarter-dollar, half-dollar and dollar coins, statehood and other special coins, territorial-era and war-era notes and more.

The sale will also include rare local currency.

For instance, a unique 1839 $5 note was produce by the company Ladd & Co for employees to use in its company store, due to the scarcity of regular currency.

The Ladd & Co note is expected to bring $20,000-30,000.

For one of the 1847 Hawaiian cent coins, the auction catalogue warns: "Bidders will have to submit a strong bid to [ensure] ownership."

The 1847 coin and others are valued at $1,300-1,400.

The auction catalog can be purchased from the auction houses for $15 but can be viewed online or downloaded for free.