Hi, bought this as part of a lot and it is not my area. However it is the same old question of Strathearn, early Perthshire or something else?.
My view was pre-1978, PP1 as it is 3" diameter with fire-polished pontil. However in the "Complete Guide to Perthshire Paperweights", it only mentions two rings of canes around the central cane whereas this has 3. I guess this may not be sacrosanct but I would be grateful for confirmation.