Thanks for the extra pictures.
Like Frank I find this one difficult and would prefer to handle it, but insinctively I don't think Monart.
I am particularly suspicious of what appears to be a thick, clear casing at the base. The vase also looks like it might be a bit thick walled and heavy for its size - but that really needs first hand experience of the piece in order to evaluate those characteristics.
Unfortunately, despite your best efforts the pic of the base is still coming through as diagramatic for me, so I can't comment on the base finish.
Hope some of this helps, Nigel