Having sought another opinion and also having looked through The Complete Guide to Perthshire Paperweights, I am reasonably sure that the canes 3 C and 6 C are most likely from Perthshire Paperweights.
Among the "picture canes" of Perthshire Paperweights are versions of butterflies made in the "Ysart style" as opposed to being formed from a multitude of tiny rods. Also, a 20-point cog mould was often used - as is the case with the 3 C and 6 C canes here. Those points, together with the clean and tidy look to the canes are my reasons for homing in on Perthshire Paperweights.