More harmonium

I discovered that the exact same model is listed in:

http://www.reedsoc.org/ROdatabase/scrollfulldetails.asp?reg_no=3075&Choice=3&fs=Lakeside&Style=

Compare the picture in the reedsoc.org database to my own (the music stand and the top side decoration are not shown as I had disengaged them before securing the organ to the trailer):

Now I am even more excited since I know more about the organ. I wonder if there are other harmoniums in Norway of the same make and model, or if this model is unique? I also wonder if anybody elsewhere have experiences or recommendations with this organ model, how to maintain it, or other practical stuff. Are there any special written music for this instrument?