This is a Perthshire Annual Collection 1972C Limited Edition Miniature Flower. The design was Perthshire's first use of a stave basket in a paperweight. The edition size was quite large, 1000 paperweights. They came in various color combinations.
The designation of Annual Collection means that the design was made only that one year and never again. Each year Perthshire would make Annual Collection paperweights, Limited Edition weights, and General Line weights. In 1972 there were only three annual collection designs, designated 1972A, 1972B. and 1972C.