Jean, your weight was called "Lilac Vine" and was included in the 1986 catalogue of "Edinburgh paperweights" as an unlimited issue, reference E657 - 85017. It may also have been in the 1987 issues.
Edinburgh Crsytal weights all had an "E" signature cane and were made under contract by Caithness Glass in 1986 & 1987.
Bob Hall, in his Scottish Paperweights book, said, "Several thousands of [Edinburgh Crystal] weights were made ... and all were sold".