Ah, thanks for that... although mine are a little shorter (spot on 14cm). It's possible that these were made shorter especially for the set, I guess...
Not too sure about the PL pattern number - from all the boxed pieces I have to hand (dating between 1950s-2000's) all the pattern codes are numbers only.
I'm trying to find my source which stated J.E. Bang as the designer... I jotted it down when I found the set on eBay and went hunting for a designer/period, but I can't for the life of me remember where from. :?