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It is probably worth noting that 'Bohemian' does not imply 'old': there are many weights being made now in the Czech Republic that are in the style of the weights made a century ago when the Czech Republic was part of Bohemia.
My experience of Pilkington's Czech style weights is that they are neatly made with good quality glass, that usually has a yellow or green tinge to it. I have seen butterflies similar to this, various flowers, lampworked names, coloured swirls - there are a lot of designs.
Alan