Reference this post of my hydraulic clutch drama...
http://www.golfgtiforum.co.uk/index.php?topic=112628.0Can, I find the correct parts...? Can I fcuk!!
This is the part that came out and there are no reference marks or part numbers on it.

And this is the part that I bought using the part number on the post above. 1H1721401

This is obviously the wrong part ad I don´t want to even try to make it fit in case of damaging it and not being able to return it. The slave cylinder I have replaced with no fuss or drama, athough the body of it is alloy rather than steel.
Can anyone identify the 1st photo? It is the master cylinder for my Golf G60 shed. Does anyone recognise it as maybe belonging to another car such as Passat, Corrado, or even another later Golf? If I don't get this done by tomorrow, then I will miss out on the Oxford meet next weekend!

I have had the offending part apart and the bore is very corroded, thus the reason why its knackered.