I have just got this large paperweight (3 1/2 inch diameter, 2 1/4 inch high), with a skilfully made millefiori butterfly over an intense 'Clichy blue' ground. Very competently made, using complex cane slices for the wings, a good attempt at a spotted body and a head with eyes. The butterfly floats above a cushion made by coating a white layer in bright translucent blue glass. A stunning piece which I am keeping.
Some of the canes and the polished base suggest Murano to me, but I have not seen a weight like this before. Anyone got any ideas where or when it was made?