bingo ...I think - if someone could double check for me please.
According to Pressglas Korrespondenz May 2012-2
Kunst-Glas-Industrie Fritz Heckert, Petersdorf im Riesengebirge, Briefkopf o.J.
aus Żelasko, Fritz Heckert, Kunstglas Industrie 1866-1923, Glasmuseum Passau 2012, Einband Rückseite (Ausschnitt)
on page 18 there is a gourd vase that I believe is the same shape as Christine's. It is enamelled but appears to be the same shape, colour and iridescent finish on the blank.
According to the information given on that vase it is
"Kat.Nr. 251. Vase
Formentwurf Ludwig Sütterlin, 1900
Dekor-Entwurf Willi Meitzen
am Boden in weiß sign. FH 501/8 I
H 16 cm"
Translates as the mould design was by Ludwig Sutterlin for Fritz Heckert, and in the case of that particular piece with the enamel decoration as well, the enamelling was by Willi Meitzen. That one is signed on the base in white FH501/8I.
The description below that reads
"Goldcypern“, hellgrünes, goldirisiertes Uran-Glas, formgeblasen, geschliffen. Auf der Wandung braun und grün konturierter
Blütendekor in bunter opaker Email- und Goldmalerei. "
Translates as "Goldcypern, light green, gold iridescent uranium glass, blow moulded, sanded." and then a description of the enamel decor.
I guess those are the colours it came in - possibly there should be a comma between 'goldirisiertes' and ' Uran-Glas', so therefore it would read as two colours not one, with one being 'gold iridescent' the next being Uranium-Glas ? plus the previous two of Goldcypern and Light Green.
I can send a link to the reference source if necessary.
I'm convinced my little vase is also by Heckert in 'gold iridescent', but just need to find an exact shape match now.