John, I think what you have been told or what you have assumed is about right.
First one can be matched by type to several in books - particularly Bob Hall's Scottish Paperweights. Oh yes, and there's a couple of those shown in my own web pages - one with a "Y" cane and one without. Second one would be hard for most of us to say who made it and when. Last one I reckon is Vasart, but I suppose it could be early Strathearn years.