xshift, fluting lines are the incuse spaces on the columns. Used to give the column the appearance of depth. In this case they continue down into the steps and stylobytes.
killians, this is what's know as "anti wavy steps". 2007P-1WHDER-001WS. Trails on the working hub. The trails are raised on the working hub and incuse on the coins produced during the production run. Thus not considered a rareity, but fun to find. Also found on 2006P & D and 2008P.
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