A large number of 1851 $20 double eagles were minted this year in Philadelphia due to a large influx of newly mined precious metal from California. Strictly by mintage numbers, it is the most common $20 gold coin from the 1850s. Overall, the 1851 double eagle is well struck. In Very Fine and Extremely Fine condition, examples can be found with little effort, though AU survivors prove to be surprisingly elusive for such a liberal mintage. Mint State pieces are very scarce with perhaps 60-80 examples known, and no pieces grading finer than MS-64.