I found a guy in Netherlands who is selling an organ the same brand as yours. Maybe he has more info about your organ. http://www.harmoniums.com/sale_7.htm
I live in Brazil and I am looking for an organ just like this to buy, I mean: high, very ornate case, victorian style, with bevelled mirror, and of course, restored. Unfortunately the guy who is selling this one is completely nuts about the asking price, otherwise I would buy it from him.
Do you have pics of your pump organ? I would be glad to see it, if you don't mind.
All my best regards,