1861-S Double Eagle: There are two important varieties of San Francisco double eagle dated 1861. The more common of the two is the 1861-S with a normal reverse. This date is readily available in grades up to AU55 and scarce but obtainable in AU58. In Uncirculated, it is very scarce and it is very rare in MS62 or better. For most Civil War collectors, a nice MS60 to MS61 will suffice. The rarer variety is the 1861-S Paquet Reverse. There are a few hundred known, at most, and many have been found overseas since the 1970's. This issue is typically seen in EF40 to AU50 and properly graded AU55 examples with good color and surfaces are quite rare. I have seen one or twwo with claims to Uncirculated and the nicest to be sold in recent memory was Heritage 1/12: 5039, graded AU58 by NGC, that brought $184,000. This is a coin that I would stretch on if I were a Civil War collector due to its unique back story and appearance.
1861 Summary: This is a very interesting year in the annals of American gold coinage. You have coins struck this year that are very common (gold dollar, quarter eagle and double eagle), coins that are extremely rare (1861-P and 1861-S Paquet double eagles) and coins that are highly prized due to their historic connotations (1861-D dollar and half eagle, 1861-O double eagle).