My opinion on age would be to suggest not as old as 1930s. Always dangerous to generalize, but looking at cut glass styles from between the wars, there appears to have been more of a lean toward geometric cutting - plain deep mitres and designs created from curved mitres etc., rather than a mixture of cutting and wheel engraving - exceptions, for example, might be Murray for S. & W.
I could be wrong but would suggest the matt poppy details are likely to be wheel engraved rather than the etching you suggest (which is a wet process).
As John suggests, Webb Corbett (David Smith), Stuart (John Luxton), Thomas Webb (David Hammond) were major designers who were active during the 1950 - 1960 period, and who produced stunning work incorporating both cutting and wheel engraving - often using flower motifs - and when you consider that era is now c. seventy years old, then some reasonable wear is to be expected.
I've looked in my couple of books devoted to cut glass, but couldn't see this design - usual problem for collectors of cut material is the lack of a decent book.
Fingers crossed someone will recognize this one.