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Hi.
The little rose cane frequently appears at the edge of a different design of Chinese paperweight which has a stylised tree with two rather simple bird canes. My feeling is that yours dates to more like 1950 than 1930: earlier scrambles do not have quite such vivid colours, and sometimes include some more complex canes.
I think it is relatively unusual to find a rose cane in a scramble. Not sure it does much to increase the value though.
Alan