You need to go here, the ULTIMATE site for Czech,Austrian,Bohemian --
http://www.ginni.com/collection/factory_table.htmlGo to H, and you'll see at least a couple of factories that used H & C, with great history, marks examples. If you don't find your mark, and Ginni on her site states that Rosa Porzellan is a work in progress, she may have time to help you.
She would want a clear color photo of the vase, and one of the bottom showing the mark. A photo looking down at the vase from the top is always good too. Without proper ID,I wouldn't attempt to guestimate a value, only to say this: it is NOT a thrift store item. It has value. KB