Antiques: Thrift store auction yields fine cameo glass bowl

Q:  I recently acquired this piece at a thrift store auction for $75. It is a large fruit bowl, 12.7 cm tall (5 inches) with a diameter of 33.5 cm (13.25 inches). It has a floral pattern of carved glass overlay over frosted glass— possibly called Cameo Art Glass. It has no markings that I can find. I would be interested to find out when it was made, by whom and what value it may have.  It is a very beautiful bowl. Thank you.
Trish, Kitchener
 
A:  Indeed, you do ha