Mstisov, I understand that most of the workers were moved to Karlovarske Sklo where some of their hot worked designs continued being made. This is a subject area Jindra and I are very interested in understanding in better detail!! This blue-brown is more often associated with Mstisov-Karlovarske Sklo without a doubt. The lumpy tree trunk shapes are all Karlovarske, usually seen in these kinds of colours but perhaps even sharper colour contrast, they are never Skrdlovice. This is not quite the tree trunk type and the colours may pass for Skrdlovice. Sometimes even contrast on a photo can make a difference to understanding the exact colours..... also the mix of colour in the factory on the day can result in sharp or soft colouring, especially at Skrdlovice, where a lot of variation is seen in intensity, but as I say, this vase and the one above could be either without more evidence. My photo of a similar vase above is in classic Skrdlovice green-brown but I have seen evidence in CGR of one of the Zemek brothers designing a very similar vase. The fact F. Zemek designed hot worked pieces at Skrdlovice and Mstisov and his brother designed similar pieces at Mstisov too, does not make the whole thing any easier to unravel. The variability of hand made production can add to this confusion as each hand makes the vase slightly different each time, but I agree with you about colourways, generally they are usually a very useful indicator of origin, ideally to be backed up by an image in Czechoslvak Glass Review, catalogues, labelled pieces etc...
Robert (bOBA)