The very popular reverse of 1860. These were considered patterns until recently and are now collected as part of the regular issue. These were struck in December 1859 as the newly adopted design. With a mintage of only 1,000 pieces, it was likely seen right away to be an issue to be saved, so apparently a dealer bought them all for close to the $10 face value they represent. Over the years they were sold to collectors. None were released into circulation. The reason they were considered patterns was a comment that Mint Director Snowden wrote in his 1860 book on coins. He mentioned that patterns were struck with the new reverse. The rare proof issues might have been this pattern issue he spoke of. I surmise that the book went to print before December 1859 prior to these 1,000 Mint State pieces were struck. Regardless, patterns were not typically struck in non-proof format and in such a quantity, the 1856 Flying Eagle cent being the rare exception. There was no need to test the design in a simulated press run in 1859. Therefor, it is now considered a regular issue.