This is definitely Mtarfa. A very strange design indeed - one I don't often think works, but yours is slightly unusual.
The colours used in it are a bit more complex than you first might suspect, they arise from the use of silver chloride or silver nitrate, which reacts with the hot glass. and the colours that had been added to it, in this case, probably silver nitrate, with red glass - which goes brown.
This is, I believe, quite an early Mtarfa colourway, it's one I have collected a bit, and yours is the first snakey bottle I've seen that uses this colourway. Normally, it just comes white and another colour of splodges.