Seleco are an Italian projector manufacturer, if memory serves me right. I don't know much about their remote codes, to be honest. I've seen their equipment at trade shows like CEDIA, but not had my hands on one of their remotes with test equipment around.

I know some projector manufacturers use a 455 KHz carrier, which Pronto can't learn (but can send :-) but I don't know if Seleco is one. Best thing to do would be for you to call them and ask...