Thanks for the explanation, Bill.
I will leave it to others to comment on your main question because I really do not know the answer.
But in respect of:
I've seen a few pieces for sale that are obviously missing a cane in a circle or where one of the circles was smooshed or canes were tipped. Were these sold as 2nds at the time?
In the main, the quality control at Perthshire Paperweights was simple ... "is it riight, sell it"; "is it wrong in ANY way, bin it". Whether that applied to the first couple of years, or so, is something I do not know.
One thing I do know (that may or may not have applied to PP) is that, perhaps surprisingly, the exact same cane - with the same "defects" - such as for a famous "buterfly cane" can be found in "Ysart work" across many decades. So - what was the length of the cane before it was sliced up?