A nice eBay find.  Very thin crepe de chine with a fan border print in pastel colors.  This one was kind of a gamble since it was very poorly photographed in the auction (lots of backlight) so the design was hard to see.  But I got it cheap so I wasn't too worried.  When it arrived I was amazed... it really is a beautiful design.  I suspect it is a reproduction of an older shirt, like most Avanti's.