Expansion tank cap double check please

[zooooom]

Can someone please confirm this is the correct one for T350c, before I order one.
The part numbers match up against the one in the Sagaris workshop manual, its just the underside looks different ???

http://cgi.ebay.co.uk/VW-RANGE-AND-GOLF-RADIATOR-E...

[K100]

I bought the same part number last years and it fits just fine.
I changed mine because when I filled it to the level in the hand book it throws lots of coolant out when hot. Eventually I followed the advice on here that it 'finds it's own level'.

H