Hi John: Guess you've noticed I've been away from here for a while. Spent 3 weeks in hospital last Apr. and don't get online all that much except on FB a bit. Just curious to know if Sireno ever published a catalog or pages on the dualtone sirens they made. I had one many years ago and I understand they were special order. I've only seen two...the one I had and one that Kevin O'Connell traded for a few years ago.