http://ekizo.mandarake.co.jp/auction/it ... dex=313591
This is the A20 cel from one of the early scenes, before the credits roll, showing Sakura confronting and sealing The Arrow in this unique battle costume. Here's a screen cap of this exact moment.

As you can see, this cel originally had a B-level cel that contained Sakura's hand holding The Windy. While that is missing, it's still a very intense cel of a rare costume and well worth the opening bid of 12,000 yen.
Now what is interesting that I actually already own what appears to be the identical cel (A20), which I picked up on Anicyo (anyone remember Anicyo?) in December 2007. Here's the link to my gallery page:
http://sensei.rubberslug.com/gallery/in ... mID=226831
That also lacks the B-level layer with Sakura's hand and the card. It also came with no douga, which was not unusual for movie cels (my records show that about half my Movie 1 and 2 cels lacked dougas). The Mandarake cel, by contrast, does come with a douga.
I've compared the Mandarake scan with the screen cap and with my scan, with no clear results. The main differences are in the hair highlights that fall behind where the card is in the screen cap. Otherwise, I can't detect any obvious differences in the line tracing or the colors.
Interestingly, I got out the cel itself, and the sequence number is not only the same, but appears to have been written by the same person with the same distinctive way of making the "A." And while the painting finishes up very smoothly at the top and bottom of the cel in the Mandarake scan, the bottom margin of painting on mine is much more jagged, with a number of individual brush strokes extending down toward the bottom of the cel.
Neither one seems obviously a fake. Given CCS's penchant for "rejected takes," could one perhaps be the cel that was filmed and the other a studio production cel that was set aside for some reason? The presence of the douga with the Mandarake cel might help determine that one as the "real" A20 -- but I have at least one "test" cel that came with a douga also.
And it is odd that this one -- the A20 -- comes up for auction now (rather than A19 or A21). Not a key, as Mandy's douga shows. And neither one has kept the B-level top cel with the hand.
Any ideas?