Thank you Brenton, questions very much appreciated! (Could always lead to possible mistakes made :angel: )
1. HEIDI first appeared 1941 in Brockwitz catalogue (not named Heidi at that time, just # 6931, may also read 6937

)
Brockwitz ceased in 1941, and several moulds were sold - Bernsdorf bought at least 4 or 5 vase moulds.
This one, and others, appear for the first time in 1951 catalogue of VEB Ankerglas Bernsdorf - now named HEIDI
2. Walther NEPTUN:
You are right, I bought it like this and could well be a marriage - may be, there was also this pattern with a 'cork' - would look perfect
http://www.pressglas-pavillon.de/tafelaufsaetze/00683.htmlMy bowl seems to also fit the POSEIDON base, but looks post WWII production for export.
The 1936 catalogue's bowl is a third unknown pattern - could be a 'Meisterstück' :huh: