I finally stripped the master cylinder out - it has some internal fault and I cant get it apart
So anyone got one in ok condition?

Thanks

That's a bit of a bugger mate..... It should pull apart after you remove the clip at the opening

I thought so   im an old git and worked on a few masters on other vehicles -  I removed 9 +10 and removed screw 3
But I couldn't get the piston out - I blew an airline trough the port to ease the piston out but no joy

the piston moves back and forth on the spring but pressure is very low almost non existant

There are some cheap ones on ebay at £31 including post    anyone used these?

You said cheap and brakes in the same thread......

That's true - there seems to be a wide price difference from £31 -45 - 60 - 130 -150   
Just wondering whats the difference  after all our braking systems are primitive and were designed 50 years ago.

I'd go for this as I like to stop
https://m.vwheritage.com/productDetails.cfm?iItemID=55837
Don't forget your residual brake pressure valves if they are on the old one.