Other coins to watch are the 1861-o $20 double eagle gold piece, and the 1861-D [Dahlonega, GA] $1 and $5 half eagle gold, and the 1861-C [Charlotte, NC] $5 half eagle gold [Liberty Head, and Coronet Head] coins. To my knowledge, no exhaustive die variety study has been done any of these coins, as on the 1861-o Seated Liberty half dollars, perhaps because there aren't enough extant examples, or original die varieties for such an exercise to make sense. However, a good many of these coins, and perhaps even most were struck under CSA authority, or perhaps State of LA authority in the case of the 1861-o $20 double eagles. The down side is, I believe they are all high four, or even five figure coins in decent condition.