Well, your description that you have seen it in more colours made my suspiction, that this piece is Czech and Skrdlovice much deeper.
I had not this piece in hand but I suppose that the pece is blown to wooden mould and the side decoration is cut later. Also the top rim, that would be normaly opened at flame is cut. The cut decoration possibly is very unique and must not be made directly in glasswork. For me it looks like Stahlikova Skrdlovice piece from 50ties, chipped on sides so originaly "improved" and fixed by side cut.
The colour of core corresponds with the colour used in Skrdlovice exactly, the shape of vase and red core is also same, only side cuts and rim are different. I would wait for ideas of Skrdlovice 50ties expert Robert - bOBA.
At German ebay you can see very often Czech glass missatributed for Murano. Mosttly Chribska pieces are attribited as Murano very widely. I keep to inform sellers about their mistakes and I keep to give them links to catalogues, some of them change mind and description, some of them are stiff and display Murano attribution possibly for commercial purposes. It makes me mad, becouse I do not assume that Czech origin is worse than Murano

Jindrich
www.cs-sklo.cz