This pie/cake pan was not available through the stores.  It was a customer reward premium.  It states " World's Greatest Baking Powder - Double Acting Makes Baking Easier" in embossed lettering.  The attached revolving arm moves smoothly.  Use it to easily release your baked dessert from the pan.  This vintage pan is functional but can also add to your shabby chic decor or vintage kitchen.  Measures 10" diam x 1.25" deep Look for other vintage kitchen items in my booth.