This is definitely NOT the cylinder and it is definitely the valve. It
is called "Univer AE1001" or AE 1001.

Typical example is this thread from cnczone:

http://www.cnczone.com/forums/showthread.php?t=17283

I think that I will just get a replacement if I cannot find a kit.

I will check with these guys tomorrow:

www.pneusol.com/catalogs/univer/subbas.pdf
http://www.plccenter.com/buy/UNIVER+GROUP/AE1001