Help with maker IC 2nd class needed.

[skalphunter]

I would appreciate if somebody could tell me the maker of this IC 2nd class. No markings in the ring.
thanks
skalp
<div align="center"><p><img src="http://cdn01.trixum.de/upload2/10000/9995/2/259d60e334ebbb29c9eb2de24947d1e18.jpg" /></p><p><img src="http://cdn01.trixum.de/upload2/10000/9995/2/29893b9e50af5e79301f21c7bbe574dec.jpg" /></p><p><img src="http://cdn01.trixum.de/upload2/10000/9995/1/1071627d57e551884ab6fef244f653604.jpg" /></p></div>