Just out of interest would you know what year these were made up to?
Sadly no, I don't know exactly when production stopped; it's something I'd like to find out myself. Jobling had certainly stopped making all fancy glass by the early 1960s, but before then I don't know which pieces were still in production. Often it's assumed that much of the Art Glass range wasn't produced post-war, but whether this is true or not I can't say as I haven't found any references for this period - certainly lighting bowls continued to be made as two new designs were registered in 1946 & '47 & can be seen in Baker & Crowe.
Steven