![Image](http://i284.photobucket.com/albums/ll28/RealEstate99/Dexta/Captop.jpg)
and pic of the underside also showing the fibre washer
![Image](http://i284.photobucket.com/albums/ll28/RealEstate99/Dexta/Capbottom.jpg)
I think it came off a French Dexta so I guess it is a 4lb pressurized cap by AC.
I tried to test it by blowing into the valve at the bottom of the cap and I detect a slight leak. But perhaps i should give it the benefit of the doubt and wait to test it on my tractor to see if it leaks?
I did spot these on ebay:
![Image](http://i284.photobucket.com/albums/ll28/RealEstate99/Dexta/DextaFahler4lbcap.jpg)
A stainless steel radiator rad cap 4LB Fah-Ler caps claims to be "POLISHED LIKE CHROME- NEVER RUST"
Has anyone tried one or got a better repro cap?
TIA