Calling on our Romanian experts (you know who you are!).
I have this blue postal tax stamp but can't find the design in my Scott's catalogue. Perhaps Michel's is better for this task?
It is very similar to the style of the 1916-18 'Queen Weaving' stamps, and in fact is by the same artist, Audisio (if I'm reading it right).
Can you help me with Iding this young lady?

Looking again in the catalogue I see a gap. The Romanian postal tax stamps jump from SC#RA8 in 1918 to SC#RA11 in 1919. Could this be where they are hiding?