From another thread, Dirk has found some information that says the Heckert Cypern range blanks were produced by Josephinenhutte whether they are decorated or undecorated versions, and references Stefania Zelasko's new book on Fritz Heckert (I'll find the exact source and add it in a mo)
The link Dirk gave to the site where the information came from ( a seller called Neuwirth) also shows an image of a vase in blue selling as Fritz Heckert cypern, which is the same as Christine's gourd vase.
see here for Dirk's message
http://www.glassmessages.com/index.php/topic,52456.msg297779.html#msg297779So based on that information, Christine's gourd vase would be designed by Fritz Heckert with the blank produced by Josephinenhutte

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