A collection of rare American coins could bring in as much as $20 million at auction in New York next month.

A Flowing Hair Silver Dollar from 1794 is one of more than a hundred coins that is going on the auction block at Sotheby's.

It's one of the first silver dollars ever put into circulation and is expected to sell for between $3 million and and $5 million.

This 1795 gold coin - which was first minted for $10 - could go for as much as $1.2 million.

A coin known as a "Small Eagle" could rake in as much as $750,000.

The coins go up for auction on September 30.