Pretty sure, yes.

It's listed in Alexandrie's portfolio on Pixstudio as a Windowblinds 3 default. http://www.pixtudio.com/portfolio.php?pagenb=4
(scroll down to the very bottom)
Some other WB3 beauties here too. http://www.pixtudio.com/portfolio.php?pagenb=5
There's something strangely appealing about those old skins, they still look great today IMHO.
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